Flu Has Disappeared Worldwide during the #COVID Pandemic - Scientific American
▻https://www.scientificamerican.com/article/flu-has-disappeared-worldwide-during-the-covid-pandemic
Because each year’s flu vaccine is based on strains that have been circulating during the past year, it is unclear how next year’s vaccine will fare, should the typical patterns of the disease return. The WHO made its flu strain recommendations for vaccines in late February as usual, but they were based on far fewer cases than in a common year. At the same time, with fewer virus particles circulating in the world, there is less chance of an upcoming mutation, so it is possible the 2021–2022 vaccine will prove extra effective.
