Delta Variant Making It Harder To Reach COVID-19 Herd Immunity

Video Credit: WBZ CBS Boston
Published on August 4, 2021 - Duration: 00:58s

Delta Variant Making It Harder To Reach COVID-19 Herd Immunity

Because the Delta variant spreads so easily, some believe that percentage for COVID-19 herd immunity is now closer to 80%, perhaps even as high as 90%.

WBZ-TV's Dr. Mallika Marshall has more.


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