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joshua sharfstein

Credit: JAMIE KELTER DAVIS/The New York

‘There are reasons to be optimistic’ about new COVID boosters, expert says

Former Md. health secretary says coronavirus taught several lessons

Coronavirus positivity rates creeping up in Maryland, Virginia

Experts: DC region ‘not out of the woods yet’ on coronavirus

Is it possible to get to zero coronavirus cases without a vaccine? A local doctor explains

Expert: Positivity rate doesn’t give full picture of region’s overall health