A new study identifies a mechanism for how COVID vaccines may, in infrequent cases, drive heart inflammation, a condition ...

Study points to source of "very, very rare" cases of myocarditis and potential solutions. Myocarditis risk remains far higher ...

A new mRNA vaccine against the flu has proven itself more effective than existing vaccines in a new clinical trial. The Pfizer-developed vaccine was found to be 34.5 percent more effective than ...

So-called mRNA vaccines saved millions of lives during the COVID-19 pandemic — and now scientists are using that Nobel Prize-winning technology to try to develop vaccines and treatments against a long ...

A few years before he took over the U.S. Department of Health and Human Services, Robert F. Kennedy Jr. called COVID-19 shots ...

Covid-19 vaccines did not lead to higher death rates in France, according to a new study using data from 30 million adults.

While mRNA vaccines trigger potent initial immune responses, emerging data suggest they do not generate durable plasma cells, ...

Results from early-stage trial show that 80% of participants who received one of two HIV vaccine candidates produced antibodies against viral proteins. Two vaccine candidates using mRNA technology ...

Vaccines that resemble viruses generally produce a stronger immune response, while mRNA versions are much quicker and cheaper to make. Now we are getting the best of both worlds, in the form of mRNA ...

MRNA technology is facing growing doubts among Republicans. This is a KFF Health News story. Researchers racing to develop bird flu vaccines for humans have turned to a cutting-edge technology that ...