Influenza viruses may have originated in fish 600 million years ago

A flu microorganism recovered successful a sturgeon hints that influenza viruses originated successful food astir 600 cardinal years agone and evolved with their hosts to infect a wide scope of taxon today.

Influenza viruses origin unwellness successful galore vertebrates, including humans, birds, cats, whales and dolphins, but small is known astir however they archetypal evolved.

In 2018, researchers identified a microorganism from a hagfish that resembled a predicted ancestral signifier of …