DiscoverKCRW's Press Play with Madeleine BrandVaccines, skepticism, and herd immunity
Vaccines, skepticism, and herd immunity

Vaccines, skepticism, and herd immunity

Update: 2020-08-07
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Some companies are in phase three trials for COVID-19 vaccines. KCRW looks at the work being done by Moderna, Pfizer, and AstraZeneca. However, some Americans are concerned about safety and effectiveness. How many people will have to get vaccinated to achieve herd immunity?



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Vaccines, skepticism, and herd immunity

Vaccines, skepticism, and herd immunity

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