An avian flu outbreak at California's Año Nuevo State Park is spreading across the Central Coast, infecting elephant seals, a sea otter and a sea lion.

An avian flu outbreak, which killed several elephant seals at California’s Año Nuevo State Park last month, has spread to ...

A long-running debate in vaccine design revolves around whether a vaccine should be optimized to prevent the virus from replicating inside an infected host or prevent the virus from transmitting to ...

As the U.S. flu season winds down, health officials say the flu vaccine didn’t work very well. It had one of its worst effectiveness rates in more than a decade.

Virologists across the globe are raising alarms over the spread of the H5N1 avian flu virus, which is now infecting not just birds, but cattle and humans. While the U.S. Centers for Disease Control ...

Two weeks after scientists confirmed the first-ever outbreak of avian influenza, or bird flu, in elephant seals along the California coast, the disease has spread to other marine mammals, researchers ...

The CDC's interim VE analysis included data from 142,494 people in three surveillance networks. In outpatient settings, 26% to 32% of adults who tested positive for flu were vaccinated, compared with ...

After H5N1 bird flu was detected in elephant seals gathered at Ano Nuevo State Park, other marine mammals have also succumbed, including a sea otter and sea lion. So far, only animals in San Mateo ...

Prior exposure to one strain of influenza virus may weaken children's ability to mount an effective antibody response against their subsequent exposure to a different flu strain, according to a study ...

Spain informed the WHO of a possible person-to-person transmission of the A(H1N1)v swine flu variant. Authorities term the risk 'very low' as the infected individual showed no typical symptoms. The ...

Add Yahoo as a preferred source to see more of our stories on Google. The World Health Organisation (WHO) logo is seen near its headquarters in Geneva, Switzerland, February 2, 2023. REUTERS/Denis ...

BARCELONA, Feb 27 (Reuters) - Spain has informed the World Health Organization of a possible infection with the swine flu virus in its A(H1N1)v variant that may have been transmitted between humans, a ...