You can upload your state's requirements to SNAP, so it will tell you if a student is compliant (most of the time) or not with immunizations once the dates are entered. However, the immunizations are not preloaded, but once I do the thing I describe below, it's not too time consuming to enter dates.
To enter the immunizations, well, this is what works for me:
I pick either varicella or MMR (usually varicella so we will go with that one) and click add new x 2. You have to choose varicella for each entry and then enter the dates. Then I click off of the immunization entry page (like to demographics or screenings- doesn't matter where you click) and then click on the immunization entry page again. When you do this, the varicella vaccine dates you just entered are now in a group and you can now enter the rest of the vaccinations in a group. So I click new 5 times, then choose DTaP/DTP from the drop down menu once, and just enter the dates. It's a quirky workaround, but it works for me.