In 2020, all the precautions that helped people avoid Covid had an unexpected benefit: An entire branch of the flu’s family tree, a B strain that geneticists call the Yamagata clade, disappeared, and it hasn’t been detected since.
...Nearly half of people ages 50 and older who were very concerned about the cost of surgery wound up not having an operation they had considered, researchers reported Tuesday in the journal JAMA Network Open.
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