Bird flu can jump to mammals. Should we worry?

An uncomfortable truth is that there is another influenza pandemic in humankind’s future. Whether it will be a relative of the lethal avian flu strain currently wreaking havoc in bird populations around the globe is anyone’s guess.

Because the virus, called H5N1, can be deadly to birds, mammals and people, researchers closely monitor reports of new cases. Worryingly, a new variant of H5N1 that emerged in 2020 has not only spread farther than ever before among birds, but has also spilled over into other animals, raising the specter of a human outbreak (SN: 12/12/22).

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