can roseola be spread or carried to other children by contact before rash appears?

Hi Anon,

Welcome to EmpowHER. Because 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.

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.

Here are some resources for you

https://www.empowher.com/condition/roseola

Best,

Daisy