Yes, I remember Q posting that. Since Q did not say which is which (would have tipped of bad guys, too) will you risk it? I have my own (thoughtful?) opinions.
I think BCG might have been somewhat useful. Same for smallpox (vaccinia). Tetanus by itself. High does measles has been used to kill a brain tumor.
You will notice something funny about all the potentially useful vaccines: The CDC does not recommend them!