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 ...

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 ...

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 ...

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 ...