If you never had chickenpox or received the immunization, then you are at some risk of acquiring chickenpox from exposure to active shingles lesions. You could consider getting a blood test to see if you already have antibodies to chickenpox, and if you don t, could consider getting the series of immunizations, although you may not have adequate time before the trip. You can reduce the risk by avoiding any direct physical contact with the person who has active lesions, particularly contact with the lesions themselves, be sure the person covers them well and that both of you wash your hands frequently and don t share any clothes, towels, sheets, etc. Hope this helps.