Pfizer

With slight upticks in positive testing rates linked, in some cases, to larger social events, Gov. Charlie Baker said Thursday that his administration is reviewing the state’s guidance on gathering sizes, but blamed the behavior of people at some of the parties in question for the clusters of infections that have sprung up. A large party in Chatham was...

Massachusetts Gov. Charlie Baker spoke Thursday in Andover, where Pfizer is testing a vaccine for coronavirus.

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Pharmaceutical company Pfizer has been chosen to mass produce a possible coronavirus vaccine, potentially by the end of the year, at its Andover, Massachusetts location.