Silent Spread: New Study Shows Bird Flu Infections in Veterinarians That Were Not Diagnosed Before.

A new study found that some veterinarians have gotten bird flu from animals. The veterinarians didn't know they had bird flu because they didn't feel sick.

This study and other smaller studies show that the number of bird flu cases in the US is probably higher than we think. People might be getting bird flu from animals but not going to the doctor because they don't have symptoms.

In the new study, researchers tested the blood of veterinarians and found that a small number had signs of past bird flu infection. These veterinarians worked with different animals, including cows and chickens.

Other studies have also found evidence of past bird flu infection in people who work with animals, like dairy farm workers. While these studies were small, they suggest that many people in the US may have gotten bird flu without knowing it.

Although it's concerning that bird flu is spreading, the good news is that people seem to develop immunity after getting infected. However, it would be a bigger problem if the virus changes and starts making people very sick or spreading easily between people.