Actually there is a lot of science which calls into question the efficacy and safety of many vaccines (mmr is one such example). But it was all censored back when "anti-vaxxer" became a thing. Then it became a witchhunt for anyone who was educated on the topic. Current immunologists state vaccines are 70 years behind our current understanding of the immune system and that they can in fact be problematic. Creating permanent injuries even when everything works as desired.