Experts are casting a wide net for treatments, with few ready for formal clinical trials.

Get a COVID booster, especially if you’re older or your immune system is compromised, and don’t forget the flu shot.

Safety tips for the evolving pandemic. Plus: Which groups—such as those with cancer or HIV—are at higher risk for COVID-19 complications?

Study finds that HIV-positive people are four times more likely to experience long-term COVID symptoms.

The small study found no evidence of delayed development of antibodies in participants who experienced rebound after taking Paxlovid.

Higher levels of viral antigens in the blood correlated with more severe disease.

The update aims to help the public better protect themselves and understand their risk.

People of European or African ancestry who were hospitalized for COVID-19 are more likely to carry particular genetic variants.

Two drugs widely used to treat certain autoimmune diseases substantially improved clinical status and reduced deaths.

Using machine learning, researchers find patterns in electronic health record data to better identify those likely to have the condition.