Rapid spread of H5N1 bird flu through California dairy herds suggests unknown paths of transmission

Rapid spread of H5N1 bird flu through California dairy herds suggests unknown paths of transmission Reports that cows have been infected despite farmers' preventive measures indicate there are multiple routes of transmission Megan Molteni STAT

In the ongoing outbreak of H5N1 bird flu among the nation’s dairy cattle, federal officials have consistently expressed confidence that they know enough about how the virus is spreading to put a stop to it. But among epidemiologists and other infectious disease experts, there has been skepticism that the U.S. Department of Agriculture’s theory of viral transmission is telling the whole story. And perhaps there is no greater cause for scrutiny than what’s currently happening in California.

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