Health
COVID pandemic may have driven influenza strains to extinction
He said B / Yamagata tended to surge in certain years and virtually disappear in other years.
“I don’t think it’s a compelling argument in itself, just evidence that we haven’t seen it for a while,” Kennedy said. “It’s good because we haven’t seen any cases since March 2020, but since it was previously hidden from us, we want to extend the period when these strains aren’t seen.” “
Now that COVID restrictions have been relaxed and children are returning to school, there is growing concern among public health officials that the flu season could be tougher. B / Yamagata said he could resurface.
“These viruses are very good at making up for the time and distance lost in this race,” Kennedy said. “We may move on, but if we don’t continue, we can’t handle it.”
Dr. William Schaffner, Medical Director of the National Foundation based in Bethesda, Maryland, said that if B / Yamagata really disappears, the strains in the annual flu vaccine will be adjusted to make more money. Means you can get it. Infection.
The current structure of influenza vaccines includes four strains of influenza A / H3N2 (Hong Kong) and influenza A /.H1N1 (Pig), influenza B / Victoria, influenza B / Yamagata. Influenza A strains are highly infectious and tend to cause fatal epidemics, but influenza B slowly penetrates among school-age children and teens.
Every year, US scientists play a guessing game to determine which gene version of each of the four strains is the most infectious, Kennedy said. Influenza vaccines provide better protection when they guess correctly.
Replacing the B / Yamagata portion of the vaccine with another more infectious and dangerous strain could improve the effectiveness of the shot, Schaffner said.
“Can we double the next most serious H3N2 type? Can we put two H3N2 types in there?” Schaffner said.
Kennedy agreed. “If we could choose another stock that wasn’t B, the A-share, it would probably help in that guessing game,” he said.
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Sources 2/ https://www.webmd.com/lung/news/20211025/covid-pandemic-may-have-driven-a-flu-strain-into-extinction The mention sources can contact us to remove/changing this article |
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