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    <link:label id="lab_us-gaap_AccumulatedOtherComprehensiveIncomeLossNetOfTaxAbstract_2D96CB6CE7AA80EC5455DEC2ED0CA0A6_label_en-US" xlink:label="lab_us-gaap_AccumulatedOtherComprehensiveIncomeLossNetOfTaxAbstract_2D96CB6CE7AA80EC5455DEC2ED0CA0A6" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Accumulated Other Comprehensive Income (Loss), Net of Tax [Abstract]</link:label>
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    <link:label id="lab_us-gaap_IntangibleAssetsGrossExcludingGoodwill_155615B5CBD8A104E981DE9E115B19F0_terseLabel_en-US" xlink:label="lab_us-gaap_IntangibleAssetsGrossExcludingGoodwill_155615B5CBD8A104E981DE9E115B19F0" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Total intangible assets, gross</link:label>
    <link:label id="lab_us-gaap_IntangibleAssetsGrossExcludingGoodwill_155615B5CBD8A104E981DE9E115B19F0_label_en-US" xlink:label="lab_us-gaap_IntangibleAssetsGrossExcludingGoodwill_155615B5CBD8A104E981DE9E115B19F0" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Intangible Assets, Gross (Excluding Goodwill)</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2015/elts/us-gaap-2015-01-31.xsd#us-gaap_IntangibleAssetsGrossExcludingGoodwill" xlink:label="loc_us-gaap_IntangibleAssetsGrossExcludingGoodwill_155615B5CBD8A104E981DE9E115B19F0" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_IntangibleAssetsGrossExcludingGoodwill_155615B5CBD8A104E981DE9E115B19F0" xlink:to="lab_us-gaap_IntangibleAssetsGrossExcludingGoodwill_155615B5CBD8A104E981DE9E115B19F0" xlink:type="arc" />
    <link:label id="lab_us-gaap_FiniteLivedIntangibleAssetsAccumulatedAmortization_CA84C7805842F890007ADE9E115BF008_negatedLabel_en-US" xlink:label="lab_us-gaap_FiniteLivedIntangibleAssetsAccumulatedAmortization_CA84C7805842F890007ADE9E115BF008" xlink:role="http://www.xbrl.org/2009/role/negatedLabel" xlink:type="resource" xml:lang="en-US">Accumulated Amortization</link:label>
    <link:label id="lab_us-gaap_FiniteLivedIntangibleAssetsAccumulatedAmortization_CA84C7805842F890007ADE9E115BF008_label_en-US" xlink:label="lab_us-gaap_FiniteLivedIntangibleAssetsAccumulatedAmortization_CA84C7805842F890007ADE9E115BF008" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Finite-Lived Intangible Assets, Accumulated Amortization</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2015/elts/us-gaap-2015-01-31.xsd#us-gaap_FiniteLivedIntangibleAssetsAccumulatedAmortization" xlink:label="loc_us-gaap_FiniteLivedIntangibleAssetsAccumulatedAmortization_CA84C7805842F890007ADE9E115BF008" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_FiniteLivedIntangibleAssetsAccumulatedAmortization_CA84C7805842F890007ADE9E115BF008" xlink:to="lab_us-gaap_FiniteLivedIntangibleAssetsAccumulatedAmortization_CA84C7805842F890007ADE9E115BF008" xlink:type="arc" />
    <link:label id="lab_us-gaap_FiniteLivedIntangibleAssetsNet_11BBDA22B795A4CBF251DE9E115B0B58_totalLabel_en-US" xlink:label="lab_us-gaap_FiniteLivedIntangibleAssetsNet_11BBDA22B795A4CBF251DE9E115B0B58" xlink:role="http://www.xbrl.org/2003/role/totalLabel" xlink:type="resource" xml:lang="en-US">Net</link:label>
    <link:label id="lab_us-gaap_FiniteLivedIntangibleAssetsNet_11BBDA22B795A4CBF251DE9E115B0B58_label_en-US" xlink:label="lab_us-gaap_FiniteLivedIntangibleAssetsNet_11BBDA22B795A4CBF251DE9E115B0B58" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Finite-Lived Intangible Assets, Net</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2015/elts/us-gaap-2015-01-31.xsd#us-gaap_FiniteLivedIntangibleAssetsNet" xlink:label="loc_us-gaap_FiniteLivedIntangibleAssetsNet_11BBDA22B795A4CBF251DE9E115B0B58" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_FiniteLivedIntangibleAssetsNet_11BBDA22B795A4CBF251DE9E115B0B58" xlink:to="lab_us-gaap_FiniteLivedIntangibleAssetsNet_11BBDA22B795A4CBF251DE9E115B0B58" xlink:type="arc" />
    <link:label id="lab_us-gaap_IntangibleAssetsNetExcludingGoodwill_F452C9E4D9BF2E43FF08DE9E115C9679_totalLabel_en-US" xlink:label="lab_us-gaap_IntangibleAssetsNetExcludingGoodwill_F452C9E4D9BF2E43FF08DE9E115C9679" xlink:role="http://www.xbrl.org/2003/role/totalLabel" xlink:type="resource" xml:lang="en-US">Intangible assets, net</link:label>
    <link:label id="lab_us-gaap_IntangibleAssetsNetExcludingGoodwill_F452C9E4D9BF2E43FF08DE9E115C9679_label_en-US" xlink:label="lab_us-gaap_IntangibleAssetsNetExcludingGoodwill_F452C9E4D9BF2E43FF08DE9E115C9679" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Intangible Assets, Net (Excluding Goodwill)</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2015/elts/us-gaap-2015-01-31.xsd#us-gaap_IntangibleAssetsNetExcludingGoodwill" xlink:label="loc_us-gaap_IntangibleAssetsNetExcludingGoodwill_F452C9E4D9BF2E43FF08DE9E115C9679" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_IntangibleAssetsNetExcludingGoodwill_F452C9E4D9BF2E43FF08DE9E115C9679" xlink:to="lab_us-gaap_IntangibleAssetsNetExcludingGoodwill_F452C9E4D9BF2E43FF08DE9E115C9679" xlink:type="arc" />
    <link:label id="lab_us-gaap_ImpairmentOfIntangibleAssetsFinitelived_AD6204E90CA602702129DE9E115C228D_terseLabel_en-US" xlink:label="lab_us-gaap_ImpairmentOfIntangibleAssetsFinitelived_AD6204E90CA602702129DE9E115C228D" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Impairment of out-licensed patent</link:label>
    <link:label id="lab_us-gaap_ImpairmentOfIntangibleAssetsFinitelived_AD6204E90CA602702129DE9E115C228D_label_en-US" xlink:label="lab_us-gaap_ImpairmentOfIntangibleAssetsFinitelived_AD6204E90CA602702129DE9E115C228D" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Impairment of Intangible Assets, Finite-lived</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2015/elts/us-gaap-2015-01-31.xsd#us-gaap_ImpairmentOfIntangibleAssetsFinitelived" xlink:label="loc_us-gaap_ImpairmentOfIntangibleAssetsFinitelived_AD6204E90CA602702129DE9E115C228D" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_ImpairmentOfIntangibleAssetsFinitelived_AD6204E90CA602702129DE9E115C228D" xlink:to="lab_us-gaap_ImpairmentOfIntangibleAssetsFinitelived_AD6204E90CA602702129DE9E115C228D" xlink:type="arc" />
    <link:label id="lab_us-gaap_IntangibleAssetsNetIncludingGoodwillAbstract_DFB3492C84D00504071FDEA0EE5A320A_verboseLabel_en-US" xlink:label="lab_us-gaap_IntangibleAssetsNetIncludingGoodwillAbstract_DFB3492C84D00504071FDEA0EE5A320A" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:type="resource" xml:lang="en-US">Intangible Assets and Goodwill (Textual) [Abstract]</link:label>
    <link:label id="lab_us-gaap_IntangibleAssetsNetIncludingGoodwillAbstract_DFB3492C84D00504071FDEA0EE5A320A_label_en-US" xlink:label="lab_us-gaap_IntangibleAssetsNetIncludingGoodwillAbstract_DFB3492C84D00504071FDEA0EE5A320A" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Intangible Assets, Net (Including Goodwill) [Abstract]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2015/elts/us-gaap-2015-01-31.xsd#us-gaap_IntangibleAssetsNetIncludingGoodwillAbstract" xlink:label="loc_us-gaap_IntangibleAssetsNetIncludingGoodwillAbstract_DFB3492C84D00504071FDEA0EE5A320A" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_IntangibleAssetsNetIncludingGoodwillAbstract_DFB3492C84D00504071FDEA0EE5A320A" xlink:to="lab_us-gaap_IntangibleAssetsNetIncludingGoodwillAbstract_DFB3492C84D00504071FDEA0EE5A320A" xlink:type="arc" />
    <link:label id="lab_us-gaap_AmortizationOfIntangibleAssets_72C1004350B4E0C3B390DEA0EE5E4760_verboseLabel_en-US" xlink:label="lab_us-gaap_AmortizationOfIntangibleAssets_72C1004350B4E0C3B390DEA0EE5E4760" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:type="resource" xml:lang="en-US">Amortization of acquired intangible assets</link:label>
    <link:label id="lab_us-gaap_AmortizationOfIntangibleAssets_72C1004350B4E0C3B390DEA0EE5E4760_label_en-US" xlink:label="lab_us-gaap_AmortizationOfIntangibleAssets_72C1004350B4E0C3B390DEA0EE5E4760" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Amortization of Intangible Assets</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2015/elts/us-gaap-2015-01-31.xsd#us-gaap_AmortizationOfIntangibleAssets" xlink:label="loc_us-gaap_AmortizationOfIntangibleAssets_72C1004350B4E0C3B390DEA0EE5E4760" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_AmortizationOfIntangibleAssets_72C1004350B4E0C3B390DEA0EE5E4760" xlink:to="lab_us-gaap_AmortizationOfIntangibleAssets_72C1004350B4E0C3B390DEA0EE5E4760" xlink:type="arc" />
    <link:label id="lab_us-gaap_GoodwillImpairedAccumulatedImpairmentLoss_DD0B1159857B97EC7527DEA0EE5E9BC2_verboseLabel_en-US" xlink:label="lab_us-gaap_GoodwillImpairedAccumulatedImpairmentLoss_DD0B1159857B97EC7527DEA0EE5E9BC2" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:type="resource" xml:lang="en-US">Accumulated impairment losses related to goodwill</link:label>
    <link:label id="lab_us-gaap_GoodwillImpairedAccumulatedImpairmentLoss_DD0B1159857B97EC7527DEA0EE5E9BC2_label_en-US" xlink:label="lab_us-gaap_GoodwillImpairedAccumulatedImpairmentLoss_DD0B1159857B97EC7527DEA0EE5E9BC2" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Goodwill, Impaired, Accumulated Impairment Loss</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2015/elts/us-gaap-2015-01-31.xsd#us-gaap_GoodwillImpairedAccumulatedImpairmentLoss" xlink:label="loc_us-gaap_GoodwillImpairedAccumulatedImpairmentLoss_DD0B1159857B97EC7527DEA0EE5E9BC2" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_GoodwillImpairedAccumulatedImpairmentLoss_DD0B1159857B97EC7527DEA0EE5E9BC2" xlink:to="lab_us-gaap_GoodwillImpairedAccumulatedImpairmentLoss_DD0B1159857B97EC7527DEA0EE5E9BC2" xlink:type="arc" />
    <link:label id="lab_us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseRemainderOfFiscalYear_82DAD1DA83485B57BC56DEA14B66F97D_terseLabel_en-US" xlink:label="lab_us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseRemainderOfFiscalYear_82DAD1DA83485B57BC56DEA14B66F97D" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Expected future amortization expense, 2015 (remaining six months)</link:label>
    <link:label id="lab_us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseRemainderOfFiscalYear_82DAD1DA83485B57BC56DEA14B66F97D_label_en-US" xlink:label="lab_us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseRemainderOfFiscalYear_82DAD1DA83485B57BC56DEA14B66F97D" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Finite-Lived Intangible Assets, Amortization Expense, Remainder of Fiscal Year</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2015/elts/us-gaap-2015-01-31.xsd#us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseRemainderOfFiscalYear" xlink:label="loc_us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseRemainderOfFiscalYear_82DAD1DA83485B57BC56DEA14B66F97D" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseRemainderOfFiscalYear_82DAD1DA83485B57BC56DEA14B66F97D" xlink:to="lab_us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseRemainderOfFiscalYear_82DAD1DA83485B57BC56DEA14B66F97D" xlink:type="arc" />
    <link:label id="lab_us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseNextTwelveMonths_5929276452A2E3E7D3CFDEA14B680096_terseLabel_en-US" xlink:label="lab_us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseNextTwelveMonths_5929276452A2E3E7D3CFDEA14B680096" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Expected future amortization expense, 2016</link:label>
    <link:label id="lab_us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseNextTwelveMonths_5929276452A2E3E7D3CFDEA14B680096_label_en-US" xlink:label="lab_us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseNextTwelveMonths_5929276452A2E3E7D3CFDEA14B680096" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Finite-Lived Intangible Assets, Amortization Expense, Next Twelve Months</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2015/elts/us-gaap-2015-01-31.xsd#us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseNextTwelveMonths" xlink:label="loc_us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseNextTwelveMonths_5929276452A2E3E7D3CFDEA14B680096" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseNextTwelveMonths_5929276452A2E3E7D3CFDEA14B680096" xlink:to="lab_us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseNextTwelveMonths_5929276452A2E3E7D3CFDEA14B680096" xlink:type="arc" />
    <link:label id="lab_us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseYearTwo_6C3B7B97454B5445ED04DEA14B696CB5_verboseLabel_en-US" xlink:label="lab_us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseYearTwo_6C3B7B97454B5445ED04DEA14B696CB5" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:type="resource" xml:lang="en-US">Expected future amortization expense, 2017</link:label>
    <link:label id="lab_us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseYearTwo_6C3B7B97454B5445ED04DEA14B696CB5_label_en-US" xlink:label="lab_us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseYearTwo_6C3B7B97454B5445ED04DEA14B696CB5" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Finite-Lived Intangible Assets, Amortization Expense, Year Two</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2015/elts/us-gaap-2015-01-31.xsd#us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseYearTwo" xlink:label="loc_us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseYearTwo_6C3B7B97454B5445ED04DEA14B696CB5" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseYearTwo_6C3B7B97454B5445ED04DEA14B696CB5" xlink:to="lab_us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseYearTwo_6C3B7B97454B5445ED04DEA14B696CB5" xlink:type="arc" />
    <link:label id="lab_us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseYearThree_8AE03D585E97EE367D1BDEA14B6B28B9_terseLabel_en-US" xlink:label="lab_us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseYearThree_8AE03D585E97EE367D1BDEA14B6B28B9" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Expected future amortization expense, 2018</link:label>
    <link:label id="lab_us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseYearThree_8AE03D585E97EE367D1BDEA14B6B28B9_label_en-US" xlink:label="lab_us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseYearThree_8AE03D585E97EE367D1BDEA14B6B28B9" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Finite-Lived Intangible Assets, Amortization Expense, Year Three</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2015/elts/us-gaap-2015-01-31.xsd#us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseYearThree" xlink:label="loc_us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseYearThree_8AE03D585E97EE367D1BDEA14B6B28B9" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseYearThree_8AE03D585E97EE367D1BDEA14B6B28B9" xlink:to="lab_us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseYearThree_8AE03D585E97EE367D1BDEA14B6B28B9" xlink:type="arc" />
    <link:label id="lab_us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseYearFour_4646E044289B7821E0EADEA14B6C3B33_verboseLabel_en-US" xlink:label="lab_us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseYearFour_4646E044289B7821E0EADEA14B6C3B33" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:type="resource" xml:lang="en-US">Expected future amortization expense, 2019</link:label>
    <link:label id="lab_us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseYearFour_4646E044289B7821E0EADEA14B6C3B33_label_en-US" xlink:label="lab_us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseYearFour_4646E044289B7821E0EADEA14B6C3B33" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Finite-Lived Intangible Assets, Amortization Expense, Year Four</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2015/elts/us-gaap-2015-01-31.xsd#us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseYearFour" xlink:label="loc_us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseYearFour_4646E044289B7821E0EADEA14B6C3B33" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseYearFour_4646E044289B7821E0EADEA14B6C3B33" xlink:to="lab_us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseYearFour_4646E044289B7821E0EADEA14B6C3B33" xlink:type="arc" />
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    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_biib_FourbillionMember_692FB14EC0F32391BFABD4ED4BB5111C" xlink:to="lab_biib_FourbillionMember_692FB14EC0F32391BFABD4ED4BB5111C" xlink:type="arc" />
    <link:label id="lab_biib_FivebillionMember_332481569C77EB7D7323D4ED4BB5B70F_terseLabel_en-US" xlink:label="lab_biib_FivebillionMember_332481569C77EB7D7323D4ED4BB5B70F" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Five billion</link:label>
    <link:label id="lab_biib_FivebillionMember_332481569C77EB7D7323D4ED4BB5B70F_label_en-US" xlink:label="lab_biib_FivebillionMember_332481569C77EB7D7323D4ED4BB5B70F" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Five billion [Member]</link:label>
    <link:label id="lab_biib_FivebillionMember_332481569C77EB7D7323D4ED4BB5B70F_documentation_en-US" xlink:label="lab_biib_FivebillionMember_332481569C77EB7D7323D4ED4BB5B70F" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Five billion [Member]</link:label>
    <link:loc xlink:href="biib-20150630.xsd#biib_FivebillionMember" xlink:label="loc_biib_FivebillionMember_332481569C77EB7D7323D4ED4BB5B70F" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_biib_FivebillionMember_332481569C77EB7D7323D4ED4BB5B70F" xlink:to="lab_biib_FivebillionMember_332481569C77EB7D7323D4ED4BB5B70F" xlink:type="arc" />
    <link:label id="lab_biib_EachAdditionalOneBillionUpToTwentyBillionMember_3E9BE8D5592079C75DEBD4ED4BB5040F_terseLabel_en-US" xlink:label="lab_biib_EachAdditionalOneBillionUpToTwentyBillionMember_3E9BE8D5592079C75DEBD4ED4BB5040F" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Each additional one billion up to twenty billion</link:label>
    <link:label id="lab_biib_EachAdditionalOneBillionUpToTwentyBillionMember_3E9BE8D5592079C75DEBD4ED4BB5040F_label_en-US" xlink:label="lab_biib_EachAdditionalOneBillionUpToTwentyBillionMember_3E9BE8D5592079C75DEBD4ED4BB5040F" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Each additional one billion up to twenty billion [Member]</link:label>
    <link:label id="lab_biib_EachAdditionalOneBillionUpToTwentyBillionMember_3E9BE8D5592079C75DEBD4ED4BB5040F_documentation_en-US" xlink:label="lab_biib_EachAdditionalOneBillionUpToTwentyBillionMember_3E9BE8D5592079C75DEBD4ED4BB5040F" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Each additional one billion up to twenty billion [Member]</link:label>
    <link:loc xlink:href="biib-20150630.xsd#biib_EachAdditionalOneBillionUpToTwentyBillionMember" xlink:label="loc_biib_EachAdditionalOneBillionUpToTwentyBillionMember_3E9BE8D5592079C75DEBD4ED4BB5040F" xlink:type="locator" />
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    <link:label id="lab_biib_OneBillionMember_BA01B70086152E91BFC6D4ED4BB50D16_terseLabel_en-US" xlink:label="lab_biib_OneBillionMember_BA01B70086152E91BFC6D4ED4BB50D16" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">One billion</link:label>
    <link:label id="lab_biib_OneBillionMember_BA01B70086152E91BFC6D4ED4BB50D16_label_en-US" xlink:label="lab_biib_OneBillionMember_BA01B70086152E91BFC6D4ED4BB50D16" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">One billion [Member]</link:label>
    <link:label id="lab_biib_OneBillionMember_BA01B70086152E91BFC6D4ED4BB50D16_documentation_en-US" xlink:label="lab_biib_OneBillionMember_BA01B70086152E91BFC6D4ED4BB50D16" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">One billion [Member]</link:label>
    <link:loc xlink:href="biib-20150630.xsd#biib_OneBillionMember" xlink:label="loc_biib_OneBillionMember_BA01B70086152E91BFC6D4ED4BB50D16" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_biib_OneBillionMember_BA01B70086152E91BFC6D4ED4BB50D16" xlink:to="lab_biib_OneBillionMember_BA01B70086152E91BFC6D4ED4BB50D16" xlink:type="arc" />
    <link:label id="lab_biib_ThreeBillionMember_75C9CF7606AC472AC4FDD4ED4BB542A4_terseLabel_en-US" xlink:label="lab_biib_ThreeBillionMember_75C9CF7606AC472AC4FDD4ED4BB542A4" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Three billion</link:label>
    <link:label id="lab_biib_ThreeBillionMember_75C9CF7606AC472AC4FDD4ED4BB542A4_label_en-US" xlink:label="lab_biib_ThreeBillionMember_75C9CF7606AC472AC4FDD4ED4BB542A4" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Three billion [Member]</link:label>
    <link:label id="lab_biib_ThreeBillionMember_75C9CF7606AC472AC4FDD4ED4BB542A4_documentation_en-US" xlink:label="lab_biib_ThreeBillionMember_75C9CF7606AC472AC4FDD4ED4BB542A4" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Three billion [Member]</link:label>
    <link:loc xlink:href="biib-20150630.xsd#biib_ThreeBillionMember" xlink:label="loc_biib_ThreeBillionMember_75C9CF7606AC472AC4FDD4ED4BB542A4" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_biib_ThreeBillionMember_75C9CF7606AC472AC4FDD4ED4BB542A4" xlink:to="lab_biib_ThreeBillionMember_75C9CF7606AC472AC4FDD4ED4BB542A4" xlink:type="arc" />
    <link:label id="lab_biib_FumapharmAgMember_6BE43698FB1DB4771027D4ED4BB58A30_terseLabel_en-US" xlink:label="lab_biib_FumapharmAgMember_6BE43698FB1DB4771027D4ED4BB58A30" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Fumapharm AG</link:label>
    <link:label id="lab_biib_FumapharmAgMember_6BE43698FB1DB4771027D4ED4BB58A30_label_en-US" xlink:label="lab_biib_FumapharmAgMember_6BE43698FB1DB4771027D4ED4BB58A30" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Fumapharm AG [Member]</link:label>
    <link:label id="lab_biib_FumapharmAgMember_6BE43698FB1DB4771027D4ED4BB58A30_documentation_en-US" xlink:label="lab_biib_FumapharmAgMember_6BE43698FB1DB4771027D4ED4BB58A30" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Fumapharm AG [Member]</link:label>
    <link:loc xlink:href="biib-20150630.xsd#biib_FumapharmAgMember" xlink:label="loc_biib_FumapharmAgMember_6BE43698FB1DB4771027D4ED4BB58A30" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_biib_FumapharmAgMember_6BE43698FB1DB4771027D4ED4BB58A30" xlink:to="lab_biib_FumapharmAgMember_6BE43698FB1DB4771027D4ED4BB58A30" xlink:type="arc" />
    <link:label id="lab_biib_TecfideraMember_E4A5BDBDFCB2F7CAA570D4ED4BB59E8A_terseLabel_en-US" xlink:label="lab_biib_TecfideraMember_E4A5BDBDFCB2F7CAA570D4ED4BB59E8A" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">TECFIDERA</link:label>
    <link:label id="lab_biib_TecfideraMember_E4A5BDBDFCB2F7CAA570D4ED4BB59E8A_label_en-US" xlink:label="lab_biib_TecfideraMember_E4A5BDBDFCB2F7CAA570D4ED4BB59E8A" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">TECFIDERA [Member]</link:label>
    <link:label id="lab_biib_TecfideraMember_E4A5BDBDFCB2F7CAA570D4ED4BB59E8A_documentation_en-US" xlink:label="lab_biib_TecfideraMember_E4A5BDBDFCB2F7CAA570D4ED4BB59E8A" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">TECFIDERA [Member]</link:label>
    <link:loc xlink:href="biib-20150630.xsd#biib_TecfideraMember" xlink:label="loc_biib_TecfideraMember_E4A5BDBDFCB2F7CAA570D4ED4BB59E8A" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_biib_TecfideraMember_E4A5BDBDFCB2F7CAA570D4ED4BB59E8A" xlink:to="lab_biib_TecfideraMember_E4A5BDBDFCB2F7CAA570D4ED4BB59E8A" xlink:type="arc" />
    <link:label id="lab_us-gaap_BusinessAcquisitionContingentConsiderationLineItems_CA5730379F77207C5A08D4ED4BB58741_terseLabel_en-US" xlink:label="lab_us-gaap_BusinessAcquisitionContingentConsiderationLineItems_CA5730379F77207C5A08D4ED4BB58741" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Business Acquisition, Contingent Consideration [Line Items]</link:label>
    <link:label id="lab_us-gaap_BusinessAcquisitionContingentConsiderationLineItems_CA5730379F77207C5A08D4ED4BB58741_label_en-US" xlink:label="lab_us-gaap_BusinessAcquisitionContingentConsiderationLineItems_CA5730379F77207C5A08D4ED4BB58741" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Business Acquisition, Contingent Consideration [Line Items]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2015/elts/us-gaap-2015-01-31.xsd#us-gaap_BusinessAcquisitionContingentConsiderationLineItems" xlink:label="loc_us-gaap_BusinessAcquisitionContingentConsiderationLineItems_CA5730379F77207C5A08D4ED4BB58741" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_BusinessAcquisitionContingentConsiderationLineItems_CA5730379F77207C5A08D4ED4BB58741" xlink:to="lab_us-gaap_BusinessAcquisitionContingentConsiderationLineItems_CA5730379F77207C5A08D4ED4BB58741" xlink:type="arc" />
    <link:label id="lab_us-gaap_BusinessCombinationContingentConsiderationArrangementsRangeOfOutcomesValueHigh_B5992331E1F873CE806AD4ED4BB6CDA9_verboseLabel_en-US" xlink:label="lab_us-gaap_BusinessCombinationContingentConsiderationArrangementsRangeOfOutcomesValueHigh_B5992331E1F873CE806AD4ED4BB6CDA9" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:type="resource" xml:lang="en-US">Maximum contingent consideration in the form of development and approval milestones</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2015/elts/us-gaap-2015-01-31.xsd#us-gaap_BusinessCombinationContingentConsiderationArrangementsRangeOfOutcomesValueHigh" xlink:label="loc_us-gaap_BusinessCombinationContingentConsiderationArrangementsRangeOfOutcomesValueHigh_B5992331E1F873CE806AD4ED4BB6CDA9" xlink:type="locator" />
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    <link:label id="lab_biib_CumulativeSalesLevel_54168BA36403C369CC05D4ED4BB6924F_terseLabel_en-US" xlink:label="lab_biib_CumulativeSalesLevel_54168BA36403C369CC05D4ED4BB6924F" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Cumulative sales level</link:label>
    <link:label id="lab_biib_CumulativeSalesLevel_54168BA36403C369CC05D4ED4BB6924F_label_en-US" xlink:label="lab_biib_CumulativeSalesLevel_54168BA36403C369CC05D4ED4BB6924F" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Cumulative sales level</link:label>
    <link:label id="lab_biib_CumulativeSalesLevel_54168BA36403C369CC05D4ED4BB6924F_documentation_en-US" xlink:label="lab_biib_CumulativeSalesLevel_54168BA36403C369CC05D4ED4BB6924F" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Cumulative sales level</link:label>
    <link:loc xlink:href="biib-20150630.xsd#biib_CumulativeSalesLevel" xlink:label="loc_biib_CumulativeSalesLevel_54168BA36403C369CC05D4ED4BB6924F" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_biib_CumulativeSalesLevel_54168BA36403C369CC05D4ED4BB6924F" xlink:to="lab_biib_CumulativeSalesLevel_54168BA36403C369CC05D4ED4BB6924F" xlink:type="arc" />
    <link:label id="lab_us-gaap_BalanceSheetLocationAxis_F9CBCEE3D80C9FE0A070B72E3D6B812A_terseLabel_en-US" xlink:label="lab_us-gaap_BalanceSheetLocationAxis_F9CBCEE3D80C9FE0A070B72E3D6B812A" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Balance Sheet Location [Axis]</link:label>
    <link:label id="lab_us-gaap_BalanceSheetLocationAxis_F9CBCEE3D80C9FE0A070B72E3D6B812A_label_en-US" xlink:label="lab_us-gaap_BalanceSheetLocationAxis_F9CBCEE3D80C9FE0A070B72E3D6B812A" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Balance Sheet Location [Axis]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2015/elts/us-gaap-2015-01-31.xsd#us-gaap_BalanceSheetLocationAxis" xlink:label="loc_us-gaap_BalanceSheetLocationAxis_F9CBCEE3D80C9FE0A070B72E3D6B812A" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_BalanceSheetLocationAxis_F9CBCEE3D80C9FE0A070B72E3D6B812A" xlink:to="lab_us-gaap_BalanceSheetLocationAxis_F9CBCEE3D80C9FE0A070B72E3D6B812A" xlink:type="arc" />
    <link:label id="lab_us-gaap_BalanceSheetLocationDomain_3981BCAFC69B727C7197B72E3D7161D8_terseLabel_en-US" xlink:label="lab_us-gaap_BalanceSheetLocationDomain_3981BCAFC69B727C7197B72E3D7161D8" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Balance Sheet Location [Domain]</link:label>
    <link:label id="lab_us-gaap_BalanceSheetLocationDomain_3981BCAFC69B727C7197B72E3D7161D8_label_en-US" xlink:label="lab_us-gaap_BalanceSheetLocationDomain_3981BCAFC69B727C7197B72E3D7161D8" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Balance Sheet Location [Domain]</link:label>
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    <link:label id="lab_us-gaap_OtherCurrentLiabilitiesMember_F15E93BB90651EDAFEB0B72E3D7157BF_terseLabel_en-US" xlink:label="lab_us-gaap_OtherCurrentLiabilitiesMember_F15E93BB90651EDAFEB0B72E3D7157BF" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Component of accrued expenses and other</link:label>
    <link:label id="lab_us-gaap_OtherCurrentLiabilitiesMember_F15E93BB90651EDAFEB0B72E3D7157BF_label_en-US" xlink:label="lab_us-gaap_OtherCurrentLiabilitiesMember_F15E93BB90651EDAFEB0B72E3D7157BF" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Other Current Liabilities [Member]</link:label>
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