Pre K must have all 4 years immunizations (see above) unless they are entering as a 3 year old. As they become four they will have to have immunizations to stay in school and can be excluded from school.The only additions to 3-4 y.o. immunizations are the series of HIB vaccines and PCV vaccines. You should have the series of 4 shots or at least one of each after the 1st birthday.