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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...
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... read more read less

3 years ago