An experimental mRNA vaccine against the H5N1 avian flu is highly effective in preventing severe illness and death in lab animals, researchers report.
The vaccine could help fight the H5N1 bird flu outbreaks now spreading in wild birds, poultry and cows in the United States, researchers said.
Stopping those outbreaks is key to preventing the H5N1 flu from leaping into humans, researchers said.
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The U.S. Department of Agriculture said this week that cow-to-cow transmission is a factor in the spread of bird flu in dairy herds, but it still does not know exactly how the virus is being moved around.
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The U.S. CDC on Friday issued a health alert to inform clinicians, state health departments and the public of a case of avian influenza in a person who had contact with dairy cows presumed to be infected with the virus.
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