Six years ago, on March 11, 2020, the World Health Organization declared COVID-19 a global pandemic. Here's what else ...

New research reveals that even mild respiratory infections can leave lasting biological changes. However, COVID-19 stands ...

A group of experts that advises the US Centers for Disease Control and Prevention on its vaccine recommendations has suspended an anticipated push to stop recommending mRNA-based Covid-19 vaccines ...

In a new study, researchers found that being hospitalized for flu or COVID-19 was linked to a 24 percent increase in later ...

On March 13, 2020, President Donald Trump declared a national emergency in response to the COVID-19 pandemic.

COVID-19 viral activity was high in the United States during the first week of September, according to fresh data from the Centers for Disease Control and Prevention. Some regions of the United States ...

Questions about the COVID-19 shot abound as federal recommendations shift and medical groups issue clashing guidance.

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. From the very early days of the pandemic, ...

The former Maine CDC director has led recent polling on the Democratic primary after becoming the public face of the state’s ...

A UVA Health study finds severe viral infections can prime the lungs for cancer, but vaccination appears to reduce that risk.