A Mystery Under Study: How, Why And When COVID Vaccines Aren't Fully Protective
COVID-19 vaccines are highly effective but don't always provide perfect protection. Some vaccinated people later exposed to the virus still get sick. Why and how often that happens is under study.
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Science - April 13, 2021 at 04:00PM - A Mystery Under Study: How, Why And When COVID Vaccines Aren't Fully Protective
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