COVID-19 Vaccine: Will It Protect Against New Variants And Do You Need A 2nd Dose?
The spread of new strains raises new questions as two COVID-19 vaccines continue their rollout across the U.S. and another vaccine candidate preps for regulatory review. Here's what you need to know.
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NPR News: COVID-19 Vaccine: Will It Protect Against New Variants And Do You Need A 2nd Dose?
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