Preexisting immunity to the 2009 H1N1 influenza virus provided near-complete protection against severe H5N1 disease and ...

An avian influenza pandemic remains within the realm of possibility. To reduce the risk, we need to engage in a One Health ...

H1N1, a contagious respiratory virus, presents flu-like symptoms including fever, cough, and body aches. Treatment involves ...

The 2025 flu season is the worst in over a decade, with record-high infections, hospitalizations, and a rare second peak.

Going into the 1976-77 winter season, the world waited – and prepared – for an H1N1 swine influenza pandemic that never came.

Scientists Say New Strain of Swine Flu Virus Is Spreading to Humans in China A new study warns that the strain of H1N1, common on China’s pig farms since 2016, should be “urgently ...

New data on hospitalizations and deaths caused by the pandemic H1N1 influenza virus show that it is ‘a disease of the young,’ said Dr. Anne Schuchat of the Centers for Disease Control and ...

Mice with a handful of cancerous cells in their lungs experienced a 100-fold increase to this number after being infected ...

Initial analyses of the sample by health authorities in Brazil have confirmed the virus behind this death to be H1N1. It is closely related to previous samples of H1N1 spotted in the region.

An epidemiologist makes the case that a rush of research to stop a swine flu outbreak led to an accidental lab release of an extinct virus. Preparing for one pandemic triggered a different one.