People in the United States can now order more free Covid-19 tests from the federal government as the country heads into respiratory virus season with high levels of the coronavirus already ...

UC San Francisco scientists have found that SARS-CoV-2 can linger in the body for years and could be driving a global epidemic in long COVID. They’re also exploring the surprising long-term risks of ...

SARS-CoV-2 infections have been rising in the past month — global cases increased by more than 19,000 last month compared with the previous month, according to data posted on the World Health ...

Kim Parker contributed to this chapter. The COVID-19 pandemic sent shockwaves through the U.S. labor market. Businesses shuttered, millions of Americans lost their jobs, and for many others their home ...