That's just modified variolation with a flu virus. We don't use that method anymore for many good reasons. Controlling a viral infection is nearly impossible, l

That's just modified variolation with a flu virus. We don't use that method anymore for many good reasons. Controlling a viral infection is nearly impossible, let alone literally billions of people, all at once. https://en.wikipedia.org/wiki/Variolation https://en.wikipedia.org/wiki/Variolation