Fifth disease is a mild rash illness that occurs most commonly in children. The ill child typically has a "slapped-cheek" rash on the face and a lacy red rash on the trunk and limbs. Occasionally, the rash may itch. An ill child may have a low-grade fever, malaise, or a "cold" a few days before the rash breaks out. The child is usually not very ill, and the rash usually resolves in 7 to 10 days.The rash may reappear off and on when the child is hot or sweaty for several weeks.
Fifth's Disease is prevalent in the entire elementary school population. Although it is usually predominant in the preschool and kindergarten children.There is no known detection of the disease before the rash breaks out. So, once they have the red cheeks and/or rash, they are not contagious and may attend school.
Women in the first trimester of pregnancy or those with chronic illness should consult with their doctor if exposed to Fifth Disease. There is no way to "warn" the public other than to say, we know spring is usual for this disease and if you are around young children, you may be exposed unknowingly.
For more information, refer to the following links:
Parvovirus B19 (Fifth Disease) FAQ
More important information about Fifth Disease