Health officials say there’s no evidence bird flu is spreading between people after investigating a mysterious Missouri infection.

Two people sharing a home caught the virus without known exposure to animals. More than 30 human cases have been reported in the United States.

The case concerned health officials and experts because human-to-human transmission of the H5N1 strain of avian influenza could mark the start of a new pandemic.

A second person in Missouri who wasn't exposed to either poultry or dairy cows has been infected with bird flu, U.S. h

Human bird flu cases in California may be undercounted as farm workers avoid testing due in part to economic concerns, according to a labor union and a state expert.

The bird flu virus hasn't yet spread from person to person, the CDC said Thursday, releasing findings from a monthslong probe into a hospitalized Missouri patient.

Blood tests of several people who were in contact with a patient in Missouri who caught H5N1 bird flu without any known exposure to infected animals reveal at least one of them — a person who lived in the same house and had symptoms at the same time — also had the virus,

As H5N1 bird flu continues to spread wildly among California dairy herds and farmworkers, federal health officials on Thursday offered some relatively good news about Missouri: The wily avian influenza virus does not appear to have spread from the state's sole human case,