Influenza viruses may have originated in fish 600 million years ago

A flu virus present in a sturgeon hints that influenza viruses originated in fish round 600 million years in the past and developed with their hosts to contaminate a variety of species at this time.

Influenza viruses trigger sickness in lots of vertebrates, together with people, birds, cats, whales and dolphins, however little is thought about how they first developed.

In 2018, researchers recognized a virus from a hagfish that resembled a predicted ancestral type of …