As damaging as H5N8 has been to birds, it had never infected people. Until February. The Russian health authorities also tested about 200 of the people involved in the cleanup of the farm in Astrakhan, using nasal swabs and later blood tests for antibodies. They reported that for the first time, H5N8 had jumped to people. Seven of the workers appeared to have been infected with the virus, although none of them became ill. Only one of those seven cases, however, was confirmed by genetically sequencing the virus.
Nonetheless, the potential danger of the new virus and its jump to humans set off alarm bells for Dr. Daniel R. Lucey, a physician and a specialist in pandemics at Georgetown University...
Dr. Florian Krammer, a flu researcher at the Icahn School of Medicine at Mt. Sinai, said he was more concerned about other avian flu viruses like H5N1 that have already shown themselves to be dangerous to people. Another avian influenza virus, H7N9, infected people for the first time in 2013. There have been more than 1,500 confirmed cases and more than 600 deaths since then. Since 2017 there have been only three confirmed cases and the virus does not jump easily from person to person.
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