Vaccines work against Covid — but not enough people are getting the shots, U.S. doctor says

The more the virus spreads, the greater the risk of new Covid variants that can evade current vaccine protection, says Vanderbilt professor William Schaffner.

from Health and Science https://ift.tt/3jlhUha
https://ift.tt/eA8V8J
https://ift.tt/2zIUzyH