What causes 5th disease?

Parvovirus B19. Fifth disease, also known as erythema infectiosum, is a common infection caused by parvovirus b19. The virus causes fever, muscle aches and headache for about 7-10 days, then produces the characteristic "slapped cheek" appearing rash on the face. This rash can be itchy and spread to the trunk, arms and legs.
A virus- parvo B19. Fifth disease is a viral infection that causes a lacy rash on the arms and legs with red cheeks that looks like the child was slapped.