<s>[INST] Hello, My mother s caretaker has shingles. She had the vaccine last July and does not have blisters, puss or wounds. She did see her doctor within 72 hours, who told her that it probably didn t fully develop because of the vaccine. She was prescribed medication. Our concern is that my Mother is 82 and is taking many medications, including Enbrel. When will it be safe for her caretaker to return? [/INST] Cellophane you for trusting ChatDoctorDear a person with shingles is not infectious before the blisters appear. Once the rash has developed crusts, the person is no longer infectious. Shingles is less contagious than chickenpox and the risk of a person with shingles spreading the virus is low if the rash is covered. Crust formation may vary from person to person depends on immunity status from 1-2weeks. I think I answered to your question if you have more questions feel free to ask. Take care </s>