Between the two types of human herpesvirus 6, HHV-6B has been detected much more frequently in hosts. HHV-6B has been shown to affect about 90% of children before the age of 3. Out of these, 20% develop symptoms of<unk> , also known as exanthem subitum.<unk>  affects girls and boys equally worldwide year-round.<unk>  typically affects children between six months and two years of age, with peak prevalence in children between 7 and 13 months old. This correlates with the decrease in maternal antibodies, thus virus protection, that occurs at the age of 6 months. Out of all emergency department visits for children between the ages of 6 months and 12 months who have fever, twenty percent of these are due to HHV-6. Many children who have been exposed and infected can present without symptoms, which makes determining the incidence within the population difficult.
Roseola
Rubella
Ebola
Scarlet fever
Measles
Mumps
Smallpox
Chickenpox