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How COVID-19 Variants Affect Herd Immunity

People wear face masks as they walk through the city center in Munich, Germany, Thursday, Sept. 24, 2020. (Matthias Schrader/AP)

Matthias Schrader/AP

Why COVID Herd Immunity Isn’t As Easy As We Think

With the COVID-19 virus able to quickly mutate, is herd immunity easier said than done? Typically, herd immunity can be achieved by vaccinating at least 70 to 90 percent of a population. But when it comes to COVID-19, public health officials say mass vaccination requires a more targeted and robust approach to succeed in achieving herd immunity.

GUESTS: Stephanie Goldberg, health care reporter at Crain’s Chicago Business

Dr. Rachel Rubin, co-lead for Cook County Department of Public Health

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