California Governor Gavin Newsom recently proclaimed a State of Emergency to accelerate California’s response to avian influenza A (H5N1), or more commonly known as ‘bird flu.’
According to Newsom, this action comes as cases were detected in dairy cows on farms in Southern California, signaling the need to expand monitoring further and build on the coordinated statewide approach to contain and mitigate the spread of the virus.
“This proclamation is a targeted action to ensure government agencies have the resources and flexibility they need to respond quickly to this outbreak. Building on California’s testing and monitoring system — the largest in the nation — we are committed to further protecting public health, supporting our agriculture industry, and ensuring that Californians have access to accurate, up-to-date information,” Gov. Newsom said in a statement. “While the risk to the public remains low, we will continue to take all necessary steps to prevent the spread of this virus.”
State health officials have reported that cases of H5N1 have been found on 641 dairy farms. The first confirmed case in the state occurred earlier in August, but roughly half of the farms were identified within the last month.
So far, no person-to-person transmission of H5N1 has been reported in California, and nearly all infected individuals have had direct exposure to infected cattle.
According to Newsom, the state has implemented the nation’s most extensive testing and monitoring system to address the outbreak. This recent declaration aims to bolster the state agencies’ response by providing additional staff and resources for testing, heightened quarantine measures, and distributing personal protective equipment to high-risk dairy employees.
Since its initial detection in Texas and Kansas in March 2024, the virus has spread to dairy cattle in 16 states.


