The detection of bird flu virus this week in a batch of unpasteurized milk sold in California underscores what health experts say are the known and potential risks of the products.

So far, there have been no reports of illness associated with the bird flu virus that was identified this weekend in a retail sample of raw milk from a Fresno-based dairy. But the dairy behind the bird flu detection,

Over the weekend, California state health officials warned the public to avoid drinking raw milk from a Fresno-based dairy farm that was being sold in stores. H5N1, the virus driving the current bird flu outbreak, was detected in a retail milk sample.