Additional testing of milk and other dairy products sold in grocery stores shows pasteurization kills a highly pathogenic strain of bird flu that has infected some dairy cows.

Ongoing testing of milk and dairy products by the US Food and Drug Administration has not found any active H5N1 bird flu virus in 297 samples of products purchased in grocery stores, the agency said Wednesday.

The U.S. Food and Drug Administration said on Wednesday that preliminary results of additional testing of more dairy products has shown that pasteurization inactivates the bird flu virus. The FDA released results from tests of products including sour cream and cottage cheese,