Vaccination doesn't have anything to do with your eating the eggs. Vaccine is to prevent your hens from getting chicken disease.
Very unlikely for you to ever get chicken diseases. If you are worried, have your own doctor vaccinate you.
Use some basic sanitation. Don't eat chicken poop (which also means wash your hands after working with the chickens).
There are some digestive types of bacteria in chicken poop which might, or might not, give you a case of the diarrhea. Don't eat chicken poop and you should be safe. Rinse the outside of the eggs before you crack them, to rinse off any possible chicken poop. Back to : don't eat chicken poop.