Spanish flu pandemic was caused by a particularly virulent strain of influenza virus. It infected 500 million people, caused ...

Influenza type B viruses are not classified by subtype and do not cause pandemics. Different strains of the flu virus mutate over time and replace the older strains. This is why it's important to ...

While the H5N1 bird flu keep spreading, the first reported H5N9 outbreak in the United States has been identified on a duck ...

The first outbreak of H5N9 bird flu in poultry has been reported in California on a duck farm leading to the culling of ...

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Recent studies have focused on innovative vaccine platforms and strategies that aim to provide broader protection against various influenza virus subtypes ... against both H1N1 and H3N2 strains ...

Interactions Between Flu Subtypes Predict Epidemic Severity ... 2023 — A new study of the strain of influenza A responsible for the 2009 H1N1 pandemic -- pdm09 -- shows that the virus has ...

A subtype of bird flu caused by avian influenza A (H5) virus has been spreading worldwide in wild birds with a few outbreaks in poultry, dairy cows and other mammals across the United States ...