More than 100 virus projects are currently going on worldwide. A race to find a vaccine! So many? Does that make the odds better the more the merrier?
No, I wouldn't. There are too many possible side effects, and some are rather grim.
Just because so many are trying to find a vaccine doesn’t necessarily make the odds better. Some may be on the same track (and that track could be wrong). Some may be in such a rush that they skip certain “steps” which can lead to an erroneous dead end or a faulty vaccine. Some may falsify outcomes just so they can be “first”.