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<p>As the continuing global pandemic threatens to overwhelm the medical response, there are tempered expectations about an imminent SARS-CoV-2 vaccine to protect the battered healthcare workforce.&nbsp;The Food and Drug Administration&nbsp;is not expecting a magic bullet, saying it would accept a vaccine with 50% efficacy as long as they are confident it would be no lower than 30% effective.</p>

COVID-19 Vaccine Imminent, but No Magic Bullet Expected