50% Effective COVID Vaccine Could Still Stop the Pandemic

50% Effective COVID Vaccine Could Still Stop the Pandemic
(AP Photo/Mark Schiefelbein)

As we get closer to a COVID-19 vaccine, it's exciting to imagine a day when the virus is gone. But a vaccine will not be a magic bullet. In fact, it may be only about 50% effective.

Dr. Anthony Fauci, chief of the National Institute of Health and Infectious Disease, has tried to set realistic expectations when discussing the importance of a vaccine. "We don't know yet what the efficacy might be.

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