Quality control checks of consumer products by the Food and Drug Administration found traces of the bird flu virus in milk supplies going to grocery stores, but the agency says the milk supply remains safe, the Washington Post reports. Bird flu had previously been found in 26 dairy herds in eight states, so the presence of genetic material in milk is not unusual. The problem, officials say, is that evidence of the virus is being found in more samples at more points of the production cycle, indicating the virus is far more widespread than currently reported. Officials, however, say the homogenization process used for dairy milk renders the flu inactive.