The avian influenza virus adapted to marine mammals. It may not have been done yet.
South American elephant seals have died in large numbers because the avian influenza virus acquired mutations that allowed it to spread among mammals, according to a new study.The research offers the first genetic and epidemiological evidence of avian influenza virus transmission between mammals. And the findings contain a warning: The virus, called H5N1, could similarly mutate to cause large-scale infections in other mammal species, including people.The avian influenza virus is responsible for an ongoing epidemic among dairy cows in the United States. Since March, it has been detected in cows in 11 states and wastewater in several others.The virus may already be spreading from cow to cow, but federal officials have said the most likely explanation for the outbreak is that it is spreadin...