Federal health officials on Thursday called for more testing of employees on farms with bird flu after a new study showed that some dairy workers had signs of infection, even

Bird flu (H5N1) has been spreading across the country, among both animals and people, since April of this year. As the Centers for Disease Control and

New CDC research suggests that a small but significant percentage of dairy farmers working near infected cows have recently contracted H5N1, often without knowing.

Rising H5N1 bird flu cases in the U.S. prompted the CDC to study the virus in ferrets, revealing it may have the potential to spread and cause severe symptoms in other mammals.

Testing of dairy workers in Michigan and Colorado shows that more workers may be catching bird flu than thought.

Informed by a new study, the CDC recommends testing dairy and poultry farmworkers exposed to H5N1-infected animals even if they show no symptoms

Federal health authorities on Thursday broadened their response to the H5N1 avian flu outbreak based on new data suggesting that the current approach to testing and treating farmworkers may have missed cases.

The health agency now urges proactive testing and treatment for the virus among any workers who were exposed to H5N1.

Following a CDC study showing bird flu exposure among dairy workers, health officials recommend increased testing and preventative measures for farmworkers, even if they show no symptoms, to prevent virus spread and mutation.

A new study found some dairy workers showed signs of infection, even when they didn’t report feeling sick. Blood tests from 115 farmworkers in Colorado and Michigan found eight had antibodies that indicated previous infection with the virus.