https://www.siliconvalley.com/2024/09/25/with-avian-flu-now-in-34-california-dairy-herds-health-experts-watch-closely/

Faced with a surge in the number of California cows infected with H5N1 bird flu, state officials have quarantined 34 dairies and are urging other farms to take protective biosecurity measures.

The milk supply is safe and the human risk is low, state health officials say.  Although 14 cases have been reported among farmworkers nationwide, none have spread from person to person. And none are in California.