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Influenza B is thought to have been made extinct recently due to the pressures introduced by SARS-CoV-2 https://www.webmd.com/lung/news/20211025/covid-pandemic

• rsfern 5y ago
  Wow, webmd made it really hard to find the primary source for that. To be clear, they are attributing this drop off of this flu strain to be likely due to pandemic mitigation efforts, as well as maybe lucky timing and some specifics of how this strain spreads Since it doesn’t seem plausible to repeat the wide scale pandemic mitigation controls any time soon, I doubt we can keep wiping out flu strains, but we could certainly reduce the damage the flu does if we want to https://www.nature.com/articles/s41579-021-00642-4 https://www.nature.com/articles/s41579-021-00642-4