When it comes to the potential of H5N1 avian flu, otherwise known as bird flu, picking up mutations that may lead to human-to-human spread, that "train has already left the station," warns one infectious disease expert.

Researchers have stressed that bird flu still poses a minimal risk to the general public, though that may change as the virus continues to circulate and potentially mutate. But the many empty shelves in stores and higher prices on the eggs that people can find have raised concerns among consumers about the safety of the egg supply.

It’s also caused by the H5N1 bird flu that has devastated the poultry industry in recent months, resulting in egg s

Bird flu cases continue to spread across the country and the world, leaving many worried about their health as outbreaks increase in poultry and wild birds. The CDC said the public health risk is currently low,