The worst bird flu outbreak in US history is 'wiping out everything in numbers we've never seen before.' Here's what you need to know.

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A dead pelican is seen on the beach in Lima, Peru on December 07, 2022. The government decreed a 90-day health emergency throughout the national territory because more than 13,000 pelicans died on the beaches of Peru, possibly infected with H5N1 avian flu.
A dead pelican on the beach in Lima, Peru on December 07, 2022.

Klebher Vasquez/Anadolu Agency via Getty Images

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