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That's literally a vaccine.

• alkonaut 6y ago
  This. Nothing stops us from doing this. Creating an attenuated virus vaccine or stumbling across one in nature is just two different ways of getting the same thing. Once you have it, you still need to do the long 3-phase approval that normally takes many years (and now takes perhaps 9-18 months because it’s an emergency). But it’s still a vaccine. The question perhaps is could we stop people from having their own “parties” with people identified to have the less dangerous immunity-causing virus? Probably not. I wouldn’t go to one though.