exposure to an infectious disease like chicken pox does not mean he is contagious. a person actually needs to have the disease in order to be contagious so depending on when he was exposed there is little or no risk especially if you had the shingles vaccine. chicken pox can be contagious a day before he breaks out in the characteristic pox lesions so there may be a tiny risk but i suspect he also had the chicken pox vaccine himself.
i have ra. my grandson has been exposed to chickenpox. should i stay away from him?