At the Hebrew University of Jerusalem, researchers have found a surprising new way to fight the flu—with help from a compound ...

Preexisting immunity to the 2009 H1N1 influenza virus provided near-complete protection against severe H5N1 disease and transmission in ferrets, even after high-dose exposure. In contrast, H3N2 ...

More information: Katherine Restori et al, Preexisting immunity to the 2009 pandemic H1N1 virus reduces susceptibility to H5N1 infection and disease in ferrets, Science Translational Medicine (2025).

A study in ferrets — which have remarkably similar respiratory systems to humans — suggests that widespread immunity to H1N1 seasonal influenza virus may explain why exposure to H5N1 bird flu ...

Scientists find that immunity to 2009 H1N1 slashes the risk of severe H5N1 illness, even after close contact exposure. Study: Preexisting immunity to the 2009 pandemic H1N1 virus reduces susceptib ...

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Studies suggest that people who had seasonal flus or vaccinations have low antibody levels against H5N1 bird flu.

The first human case of West Nile Virus has been reported in Glen Ellyn, DuPage County health officials said. The disease is typically in mosquitoes.

KINGS COUNTY, Calif. (KFSN) -- Health officials have confirmed the first case of West Nile virus in Kings County. It marks the third reported case in California so far this year.

One scenario experts have definitively ruled out is that the currently circulating bird flu virus—a member of a subtype of influenza called H5N1 for the proteins on its surface—is simply ...