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?
Vaccines, skepticism, and herd immunity
From this Episode:
Phase 3 trials are here. How close is the US to getting a safe and effective COVID-19 vaccine?
Some companies are in phase three trials for COVID-19 vaccines. KCRW looks at the work being done by Moderna, Pfizer, and AstraZeneca.
How many Americans must get a COVID-19 vaccine to achieve herd immunity?
Some polls show that about half of all Americans plan to get a vaccine as soon as one is available.
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