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Prevention
By Mayo Clinic staffBecause there's no vaccine to prevent roseola, the best you can do to prevent the spread of roseola is to avoid exposing your child to an infected child. If your child is sick with roseola, keep him or her home and away from other children until the fever has broken. Once the rash appears, the virus is much less contagious.
Most people have antibodies to roseola by the time they're of school age, making them immune to a second infection. Even so, if one household member contracts the virus, make sure that all family members wash their hands frequently to prevent spread of the virus to anyone who isn't immune.
Adults who never contracted roseola as children can become infected later in life, though the disease tends to be mild in healthy adults. The main concern is that infected adults can pass the virus on to children.
