At least one bird from a commercial poultry operation in Lancaster County has tested positive for highly pathogenic avian influenza, according to the state officials.

A number of factors - chiefly, the bird flu - is causing you to pay more for eggs at the market than ever. Will the price of eggs ever come down?

The finding indicates that the virus, known as H5N1, has spilled from birds into cows at least twice — leading to these two sets of infections — and that it could continue to do so. It also suggests that the virus may pose a persistent risk to cows and to the people who work closely with them.

Dairy cows in Nevada have been infected with a new strain of bird flu virus different from the one circulating in other herds throughout the past year, the U.S. Department of Agriculture (USDA)