As the H5N1 avian flu continues to spread among dairy cows in the United States, nearly 5 million doses of flu vaccine are now being prepared for possible use in humans. Top News U.S. News ...

The H5N1 avian flu is circulating in cows and other mammals. Whether it will make a permanent leap to humans is another ...

H5N1 avian influenza has long been a concerning virus. Since its discovery in 1996 in waterfowl, bird flu has occasionally ...

Officials this year have identified 16 people infected with H5N1 avian influenza. All have had mild symptoms. There has been no human-to-human spread of the virus.

Of particular concern are highly pathogenic avian influenza (HPAI) viruses such as H5N1, which has a fatality rate of 52% in humans, the investigators noted. “… new vaccine approaches capable ...

Depending on how the H5N1 virus mutates, U.S. officials are waiting to use the 4.8 million doses. Vaccines are prepped, just in case. Story by Eduardo Cuevas and Karen Weintraub, USA TODAY ...

Researchers are developing an mRNA-based vaccine against the contagious H5N1 bird flu virus that is spreading rapidly among poultry and cattle and has already infected two humans in the United States.

Scientists have known for more than a year that bird flu, H5N1, made the jump from wild birds and common poultry to cows and ...

This month, a Michigan dairy worker became the second human bird flu case connected to the multi-state H5N1 pandemic in US livestock. Officials found a "notable" mutation in the patient.

Vaccines remain humanity's best defense against the threat posed by the H5N1 and other strains of bird flu, according to the research published in the journal Human Vaccines & Immunotherapeutics.

The first signs that H5N1 — or any new flu virus — was starting to spread from person to person would trigger a race to produce massive amounts of vaccine to try to mitigate the damage.