I am not an epidemiologist, so I cannot answer your question directly. However, I do know that most vaccines are not 100% protection. The goal is to reach herd

I am not an epidemiologist, so I cannot answer your question directly. However, I do know that most vaccines are not 100% protection. The goal is to reach herd immunity. This is also the reason why the recent anti-vax movement is so dangerous. Even if your kid gets vaccinated, if the rest of his/her classmates do not there is still a risk of him/her catching the disease in question.