H5N1 Outbreak in Central Valley, California: dead cows piled by roadsides

California's Central Valley is facing a significant crisis as H5N1 bird flu outbreaks have led to a high mortality rate among dairy cows. Since early August, 124 dairy herds have reported infections, with mortality rates among affected cows reaching between 10% and 15%, far exceeding initial expectations of less than 2%. The situation has resulted in disturbing scenes of dead cattle along roadsides, with farmers struggling to manage the fallout. While the U.S. Centers for Disease Control and Prevention has assessed the public health risk as low, the impact on dairy operations is severe. Farmers are concerned about the long-term productivity of their herds, as many infected cows are young and may not return to full production after recovery. The financial burden is compounded by the lack of support for dairy workers, many of whom are undocumented and face economic hardships if they report symptoms. The USDA has a program to compensate farmers for production losses, but no such support exists for workers. Experts warn of the potential for the virus to recombine with human flu strains, raising public health concerns. The situation remains fluid, with ongoing monitoring and efforts to inform workers about health risks and preventive measures.

- H5N1 bird flu outbreaks have led to high mortality rates among California dairy cows.

- 124 dairy herds have reported infections, with mortality rates between 10% and 15%.

- Farmers are concerned about the long-term productivity of their herds post-infection.

- Dairy workers face economic hardships and lack support if they report symptoms.

- Public health officials are monitoring the situation due to potential virus recombination risks.