California governor declares ‘proactive’ state of emergency as bird flu spreads through dairy cows

Since H5N1 avian influenza made the unexpected jump from birds to cattle, experts are increasingly worried about human spread. 

California Gov. Gavin Newsom declared a state of emergency over the H5N1 avian influenza virus on Wednesday.

The bird flu has been spreading rapidly through US dairy cattle herds since March, with infections confirmed in 16 states. Its jump from birds to cows surprised many virologists and raised concerns about the possibility that it could mutate enough to sustain human-to-human transmission.

For now, the US Centers for Disease Control and Prevention has not detected humans spreading the virus to each other and says the risk to the public remains low.

Still, 61 human cases have been confirmed across the country, with 34 of them in California. Many of these cases have been linked to infected cows or birds.

Newsom’s declaration, which his office called a “proactive action,” followed the detection of new cattle infections on dairy farms in Southern California, according to the office’s statement.

“This proclamation is a targeted action to ensure government agencies have the resources and flexibility they need to respond quickly to this outbreak,” Newsom said in a statement.

The FDA has said that grocery-shelf beef and dairy continue to be safe to consume. However, the FDA and unaffiliated virus experts have advised against drinking raw milk, which is not pasteurized and can contain harmful microorganisms.

“While the risk to the public remains low, we will continue to take all necessary steps to prevent the spread of this virus,” Newsom said.

Also on Wednesday, the CDC confirmed the first case of severe symptoms in a human H5N1 infection, in Louisiana.