Fifths Disease Underlying Cause
Erythema infectiosum is caused by a virus, called human parvovirus B19.
Continue to Fifths Disease Transmission
- Gildea JH. Human parvovirus B19--flushed in face though healthy (fifth disease and more). Pediatr Nurs. 1998 Jul-Aug;24(4):325-9. 
- Mankuta D, Bar-Oz B, Koren G. Erythema infectiosum (Fifth disease) and pregnancy. Can Fam Physician. 1999 Mar;45:603-5.