Originally Published: 14 FEB 23 07:20 ET
By Jen Christensen, CNN
(CNN) — Avian flu has infected a record number of birds and some mammals across the United States, and scientists are keeping close watch.
World Health Organization Director General Tedros Adhanom Ghebreyesus said Thursday that the risk to humans remains low but added, “we cannot assume that will remain the case.”
As with the coronavirus that causes Covid-19 that is believed to have started in animals before spreading to humans, some animal viruses can mutate, jump species to make humans sick and spread quickly around the world.
But highly pathogenic avian influenza is no Covid-19. Scientists are reassuring the