https://www.cdc.gov/coronavirus/2019-ncov/vaccines/different-vaccines/mrna.html
It gives a "protein" which may be "on the surface" of the covid-19 virus, and trains your body to attack anything with that "protein". Whose to say they won't fucking introduce something in the future which mutates ie your intestines to have their protein all over them?
Simple. You will have to get 2 vaccines for a total of 3 dicks.
load me up
i want a dick hydra