What we do and don't know about new COVID mutations
Scientists have tracked multiple mutations of Sars-CoV-2, the virus that causes COVID-19 since it appeared in China in late 2019.
Sat Jan 09 2021
US hits 12 million COVID-19 cases as many Americans defy Thanksgiving travel guidance
The COVID-19 epidemic has claimed more than 255,000 lives in the United States - more than in any other nation.
Sun Nov 22 2020