The First Covid Vaccines May Not Prevent Covid Infection
A health worker injects a person waiting in line to receive financial aid from the government with an influenza vaccine in El Salvador. (Photographer: Camilo Freedman/Bloomberg)

The First Covid Vaccines May Not Prevent Covid Infection

(Bloomberg) -- Desperation for a way to keep economies from collapsing under the weight of Covid-19 could mean settling for a vaccine that prevents people from getting really sick or dying but does...
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