An unexpected upside of the Covid-19 pandemic is that it may have made the flu’s diversity more manageable. With Covid suppression measures like mask wearing, school closures, and travel restrictions driving flu transmission rates to historically low levels around the world, it appears a number of varieties of the flu may have disappeared. The good news about this is that with less diversity in flu strains, it makes it easier for scientists to make recommendations for vaccine strains and increases the likelihood that the vaccine actually prevents illness among the vaccinated population.

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