The first COVID-19 vaccine tested in the U.S. revved up people’s immune systems just the way scientists had hoped, researchers reported Tuesday — as the shots are poised to begin key final testing.
The first COVID-19 vaccine tested in the U.S. revved up people’s immune systems just the way scientists had hoped, researchers reported Tuesday — as the shots are poised to begin key final testing.
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A safe and effective vaccine is not expected until at least 2021, so how does herd immunity work, and how can this method help in getting us back to our lives and preventing the spread of COVID-19? BREAKING NEWS UPDATES:…