Mississippi state and federal officials have confirmed an outbreak of a strain of bird flu not reported in the U.S. since 2017, with quarantine and depopulation efforts already underway.

The U.S. reported the first outbreak of the deadly H7N9 bird flu on a poultry farm since 2017, as the country continues to grapple with another strain.

Add Yahoo as a preferred source to see more of our stories on Google. Bird flu strain hits two Indiana counties for first time. What to know Two Indiana counties saw their first outbreaks of a ...