Of course the benefits outweigh the risks. Most opposition to vaccinations are either bred out of ignorance or blatant lies. Vaccines are a proven way to prevent devasting diseases from killing you. The only reason anyone shouldn’t get one is for provable health complications, Like being pregnant, Too young, Or having a compromised immune system.
I failed to receive a vaccine for polio and subsequently died. Of polio. Fortunately for me, multiverse theory is totally spot on and my consciousness shifted to a universe in which I WAS vaccinated for polio and now I'm not dead. Do you even need any more proof than that? Quantum Immortality is the only support I need for this argument.