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(en) Nayanima Basu, « US assures export of raw materials to India for Covid vaccines as Doval speaks to Sullivan », ThePrint, (lire en ligne, consulté le ).
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(en) Adam Taylor, « A new coronavirus vaccine heading to India was developed by a small team in Texas. It expects nothing in return. », Washington Post, (ISSN0190-8286, lire en ligne, consulté le )
