Health stuff

Hi Everyone! Sorry if I repeat questions that have already been addressed, I'm trying to catch up. I'm really excited to be joining the group! Anyways, I'm wondering if there are specific health issues that I need to deal with before going to Poland. Are there specific shots I will need to get? I think my health insurance expires in May when school ends. Am I required to have insurance to travel with LE? Will insurance even matter in Poland? Thanks!