a varicella-vaccinated child who is re-exposed to chicken pox may get a "sub-clinical" case. one that is very very mild. however there are dozens of other viral illnesses that can cause those vague symptoms of low-grade fever and a few non-specific skin bumps. it may be premature to assume he has chicken pox. observation only would be a prudent course of action at this point. chicken pox even the sub-clinical cases will tend to worsen for a few days so your answer may be more obvious. if he wakes up tomorrow and his bumps have resolved then it probably was not chicken pox.
can you get the chickenpox yet not be uncomfortable? . my 12 year old son was vaccinated for chickenpox when young. in the last 24 hours he has all the tell-tale signs of chickenpox - a few bumps that spread all over his body light fever but he doesn't itch at all. does this happen? we don't know whether to let him ride it out or check to see if it's something else. thanks!