The COVID-19 virus can persist in the blood and tissue of patients for more than a year after the acute phase of the illness has ended, according to new research from UC San Francisco that offers ...

Yearly Covid-19 Booster Recommendations in Canada, Europe, and Australia. Although the rapid development of multiple Covid-19 vaccines in 2020 represents a major scientific, medical, and regulatory ...

The Covid-19 pandemic has been perceived mainly as a dangerous acute outbreak of infection that killed more than a million people in the United States and 7 million worldwide. 1,2 However, in the ...

Ziyad Al-Aly is chief of research and development at VA St. Louis Health Care System and a clinical epidemiologist at Washington University in St. Louis. Since 2020, the condition known as long ...

Helen Branswell covers issues broadly related to infectious diseases, including outbreaks, preparedness, research, and vaccine development. Follow her on Mastodon and Bluesky. You can reach Helen on ...

A sweeping new definition of long COVID could help affected people get recognition of their condition and improve diagnosis and treatment. The U.S. National Academies of Sciences, Engineering and ...