Lol, yeah so about smallpox, this virus has been around torturing humanity since the beginning till we figured out that making 4 cuts and put cowpox in there in which would make smallpox say "oh this human is occupied, ok then." And after that we then used modern medicine and we wiped out the disease.
But wait, it's still here, but it's in 2 labs in which its locked in for now, but if it gets released somehow were doomed, but no worries, since we found a cure for it we could wipe it out fast and bring it back to its lab cell again.