Pfizer and BioNTech report that their updated mRNA COVID-19 vaccine for the 2025–2026 season produced strong immune responses ...

Covid wreaked havoc on the world. It also provided an unprecedented look at the human immune system.

Pfizer and partner BioNTech said on Monday their updated COVID-19 vaccine showed an increased immune response in adults aged ...

The one thing certain about the COVID vaccine right now is that everything about it is changing.The Food and Drug ...

Experts say it’s less risky to catch Covid-19 than it used to be, but there are still good reasons not to treat it casually.

The FDA approval of this year's COVID-19 shots came with caveats, not universal recommendations. Here's what you need to know ...

A new study shows just how strong natural immunity against COVID-19 is for people who have already had the infection.

While some lucky people believe they’ve never had COVID, many are facing their second, third or even fourth infection. Here’s what the evidence shows.

Good Covid-19 data is hard to come by and harder to interpret. So if people are less likely to be hospitalized or die from a Covid-19 infection now, has the danger passed?

Study shows natural immunity to COVID can provide good protection at least 10 months after infection Researchers found that people who got sick with any pre-omicron version of the coronavirus had ...