The bird flu virus strain that is rampant among dairy cows in the U.S. may only need one mutation for it to be able to spread among humans, according to a study published this week.
Scientists said the results of this study reinforce the need for 'vigilant surveillance' of the highly pathogenic avian influenza H5N1, which has already spread from infected animals to humans at increasing rates.
will require all raw milk to be tested for bird fluThe study was conducted by researchers at the Scripps Research Institute and published in the journal Science. The National Institutes of Health funded the research. NIH said that the reason bird flu viruses have not regularly spread to people is that the human upper respiratory tract does not have the same type of cell receptors found in birds that are needed to cause an infection.
California health officials identify possible case of bird flu in a childThe authors of the study noted that the mutation testing didn't involve the creation of or experimentation with a whole, infectious virus. These findings alone do not mean that the bird flu virus is on its way to creating another pandemic, the researchers said. There are other genetic mutations that would likely have to happen for the virus to be transmitted among people.
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