Am I going to get the chickenpox?

Am I going to get the chickenpox?Two nights ago, my brother had come down with a fever. Yesterday, he was sent home from school claiming to have the chickenpox. Well, he was right - he has them. The second I got home from school, I made an immediate walk-in appointment with my doctor, and was given the vaccine (not sure why I never got it as an infant). Anyway, my question is, now that I've had the vaccine, what are my chances of getting the disease? I read somewhere that if given in the first 72 hours of exposure, I have a 70% chance of not getting it. Would this apply to me? I have final exams and SATs coming up, so it is detrimental that I not get sick. /:
Give your answer to this question below! Chicken Pox - Family Health Guide
Get the facts on the chickenpox vaccine, treatment, causes (varicella zoster virus, VZV), symptoms and signs (itchy, red rash).

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