AstraZeneca and Johnson & Johnson pledged to produce hundreds of millions of doses of their vaccines at no profit to themselves. Moderna, however, which has been granted $483 million to develop its product, made no such promise
A scientist works at the Center for Virology and Vaccine Research in Boston on May 19, 2020. In Boston and in the Netherlands, scientists are racing to build a vaccine against the virus strangling the world
Image: Tony Luong/The New York Times
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