If you have an std and pass it on to another, it really isnt your fault, if you bring a child with chickenpox who transmits vzv to an adult who never had chickenpox and develops severe shingles it isnt your fault, if you are driving in a parking lot and damage a parked car it isnt your fault, shu09 why cant you show some baseline care and responsibility to others?
The thing is … if an adult never had chicken pox, they can't get shingles. You're never going to learn.