A study by the US Centers for Disease Control and Prevention has shown the Pfizer and Moderna vaccines are 80% effective in preventing COVID-19 infections two weeks after getting the first shot — and 90% effective two weeks after the second dose. Previously, the were shown to be effective in of . This study shows they help prevent people from contracting the coronavirus.
The CDC study followed almost 4,000 health care workers, first responders and other essential and front-line workers, giving them weekly COVID-19 tests for 13 weeks in a row after they were immunized.
The news comes the same day President Joe Biden announced, and that the majority of Americans will have a vaccination site within 5 miles of their home. Biden had previously said .
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