By Liz Szabo – As an emergency physician, Dr. Eugenia South was in the first group of people to receive a covid vaccine. She received her second dose even before President Joe Biden. Yet South said she’s in no rush to throw away her face mask.
By Liz Szabo – With millions of lives on the line, researchers have been working at an unprecedented pace to develop a COVID-19 vaccine. But that speed — and some widely touted breakthroughs — belie the enormous complexity and potential risks involved.