pfizerbiontech covid 19 vaccine

  • How Worried Should We Be About the Delta Variant?

    How Worried Should We Be About the Delta Variant?

    The virus that causes COVID-19 has been a successful one from an evolutionary perspective, getting to see the world and expanding its little family tree. (Its been successful from its point of view; not so much from ours.) This means that variants of the virus have popped up in several different locations, and some are…