BioSpace August 3, 2020
With billions of doses of COVID-19 expected to be available by year’s end, and a global population of 7.8 billion, public health officials are scrambling to deliver the vaccines in ways that are equitable and effective. The challenge is about more than having a vaccine, and more than delivering it, public health experts at Johns Hopkins Medical School explained during in a media briefing Wednesday.
Vaccination has two major roles. One is to prevent individuals from becoming infected or, if they do become infected, to reduce the severity of their symptoms. The other is to enable herd immunity, which occurs when a sufficient number of people develop antibodies to the virus that the risk to unvaccinated individuals is significantly reduced.
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