pbsnewhour__ = ||| lubuntu at wor2|||Why experts are cautious about Moderna’ s COVID-19 vaccine trial||| kickerpage = |||no kicker page for PBSNewhour

pbsnewhour__ = ||| lubuntu at wor2|||Why experts are cautious about Moderna’ s COVID-19 vaccine trial||| kickerpage = |||no kicker page for PBSNewhour

A sign marks the headquarters of Moderna Therapeutics, which is developing a vaccine against the coronavirus disease (COVID-19), in Cambridge, Massachusetts, U.S., May 18, 2020. Photo by REUTERS/Brian Snyder

Why experts are cautious about Moderna’s COVID-19 vaccine trial

By Helen Branswell, STAT

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