With 55 human cases in the US and avian influenza impacting bird populations across the globe, here’s a look at why scientists are closely p
With 55 human cases in the US and avian influenza impacting bird populations across the globe, here’s a look at why scientists are closely paying attention to any evolution of this virus. Cases of bird flu across the globe are being closely watched by scientists who are looking for any signs that this type of influenza virus could turn into a more serious threat to humans. While avian influenza, or H5N1, is widespread in birds, it’s rare in humans and typically only transmits to people in close contact with an infected animal. There’s been a great deal of attention on the outbreak of avian influenza in dairy cattle and dozens of human cases in the United States, but a recent first human case in Canada this month has also raised concerns among scientists looking for any signs that the virus could change to spread among people. Why did a teenager’s bird flu case in Canada raise alarm about H5N1? Canadian health authorities reported the country’s first H5N1 case earlier this month in a teenager who was hospitalised with severe illness in British Columbia. There have been no additional cases or human-to-human transmission linked to the case, local authorities said in their most recent update this week, but the teenager remains in critical condition. There are several reasons that the teenager’s case was particularly worrying, including that it was a severe case, had no known source of contamination, and that there were certain mutations in the viral sequence, Dr Marie-Anne Rameix-Welti, head of the national reference centre for respiratory infections at France’s Pasteur Institute, told Euronews Health. “The virus sequence shows some adaptation markers, which is expected when a virus infects a mammal,” she said. -Rameix-Welti added that in this case, however, there was a mutation on the hemagglutinin - a glycoprotein that influences how the virus binds to host cells - “that we rarely see on H5 viruses”.
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It's only a matter of time. H5N1 has already infected mammals across the globe. I don't see why we would escape.
















