Moderna on Tuesday released preliminary data indicating its vaccine is likely to hold up against several variants of concern, including the Delta variant, which is predicted to become the dominant ...

More than 12 million Americans have rolled up their sleeves for the Johnson & Johnson COVID-19 vaccine. Now, preliminary but promising data shows the single-shot vaccine appeared to work well against ...

Editor's note: Find the latest COVID-19 news and guidance in Medscape's Coronavirus Resource Center. More recent studies — but not all — show waning effectiveness of the mRNA vaccines to prevent ...

Rich countries are opening up societies and vaccinating young people who are not at great risk from Covid-19, while the poorest countries cruelly lack doses, the World Health Organization said on ...

Editor's note: Find the latest COVID-19 news and guidance in Medscape's Coronavirus Resource Center. At a recent town hall meeting in Cincinnati, Ohio, President Joe Biden was asked about COVID-19 ...

A third dose of the Pfizer/BioNTech COVID-19 vaccine can "strongly" boost protection against the delta variant -- beyond the protection afforded by the standard two doses, suggests new data released ...

A federal vaccine advisory panel has changed its guidance for the updated COVID-19 vaccine. Instead of a universal recommendation for all Americans 6 months and older, the panel now advises that ...

Federal health officials upended the immunization schedule for American children this week. These are the diseases affected.