SAN FRANCISCO -- It's a story that has been making headlines across the United States: Did Californians develop herd immunity after possibly being exposed to novel coronavirus last year? On Thursday, ...

An infectious disease specialist took the time to explain what herd immunity is, how it works and when it might affect the spread of COVID-19. Dr. Frank Esper works for the Cleveland Clinic Children's ...

Some people who have previously been infected with COVID-19 and later received a vaccine may develop a powerful immunity to the virus and variants of it that emerge, recent research suggests. These ...

The immune systems of some people who have not been exposed to the novel coronavirus could have some familiarity with the pathogen -- possibly helping to reduce the severity of illness if that person ...

I asked Gemini AI to represent New Zealand's 'ninth wave' of Covid and whether it was more of a ripple. This was its (strange) creation. Photo: Google Gemini AI Protecting ourselves against Covid ...

Covid-19 was never just another cold. We knew it was going to stick around and keep changing to try to get the upper hand on our immune systems. But we've changed, too. Our B cells and T cells, ...

Hospitals and other medical providers cannot be held liable for complications that developed while treating a patient for COVID-19 during the pandemic emergency, the Indiana Supreme Court ruled ...

Flu has overtaken covid in infections and hospitalizations during the winter respiratory virus season, and their virulence is ...

As governments the world over seek ways to jumpstart economic activity, one proposal is a so-called “immunity passport” that would allow certain people who test positive for COVID-19 antibodies to ...