Vaccinations

Can somebody go to an academy if they've never been vaccinated? My cousin wants to go. She's never been vaccinated because of her families religious views and history of family members getting really really sick. So her mom has always been able to get waivers from doctors and whoever else you need to get letters from to not need to get vaccinations. She plays sports and goes to public school so that has worked out fine.
I'm just wondering what the academies would think of that and if there...

Vaccinations