The virus was reported in a commercial flock of ducks. It’s the first time the subtype has been detected in the United States ...

H5N9 is a rare subtype of the influenza A virus that can cause highly pathogenic avian influenza (HPAI), also known as bird flu. It's a reassortment strain that originated from the H5N1, H7N9, and ...

Perhaps the most notable is the so-called “Spanish flu” of 1918–1919, when the Centers for Disease Control and Prevention (CDC) estimates “an avian-like H1N1 virus” killed 50 million ...

Avian flu strains have jumped to humans before. Genetic sequencing of the virus that caused the 1918 Spanish flu, which killed at least 20 million globally, indicated it may have had avian origins.

Back in 2023, VERIFY reported that egg prices were spiking at that time because of the impacts of bird flu and lingering inflation. While egg prices soon dropped, they’ve since climbed again to ...

the month prior to the current bird flu epidemic. This story is also available in Spanish / Lee este artículo también en español: Sí, hay una escasez de huevos por causa de la gripe aviar ...