Scientists Fear Bird Flu Pandemic Coming — VOA Learning English
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Scientists studying the spread of bird flu in the United States say they worry about a lack of data in tracking the virus, called Type A H5N1.
In recent months, the disease has spread to 129 groups of cows across 12 states. Experts have identified the disease in other mammals, as well, from alpacas to house cats.
The scientists are concerned about rising cases among cows. They say the increase probably means the virus has been changing. They say such changes could make it easier for the virus to spread from animals to humans.
Three people in the U.S. have tested positive for H5N1 bird flu since late March after being in close contact with cows.
Scott Hensley is a professor of microbiology at…
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