Messages that worked to convince white evangelicals to get the COVID-19 before the shots were available actually stopped working once they came out.

Careful lab work will complement public health data as researchers worldwide focus on omicron, asking questions about contagiousness, severity of disease and whether vaccines hold up against it.

As governments and health officials navigate pandemic, researchers stress the danger that comes with bad information.

An observational study finds that antibody levels are higher when health care workers received the SARS-CoV-2 vaccine in the afternoon.

Researchers say spike protein mutations could help the Omicron variant of SARS-CoV-2 avoid antibodies produced via COVID-19 vaccination.

The new omicron variant of coronavirus has a number of mutations that may require manufacturers to update vaccines. The unique attributes of mRNA vaccines make updating them fast and easy.

The potent new adjuvant could be used to help make vaccines against HIV and other infectious diseases.

Will fears about the newly discovered Omicron variant pan out or is it just a lot of hype? Too early to tell, an expert warns.

A new freeze-dried vaccine formula that looks a lot like green cotton candy has potential for use as a COVID-19 vaccine that wouldn't need refrigeration.

In a comparison study, the Moderna vaccine was slightly more effective than the Pfizer vaccine in preventing COVID-19 infection, hospitalization, and death.