Fifth and sixth diseases: More than a fever and a rash.
"While most parvovirus B19 or HHV-6 infections resolve without sequelae,
rheumatologic and hemolytic complications and seizures can develop."
http://www.bioportfolio.com/resources/pmarticle/1104909/Fifth-and-sixth-diseases-More-than-a-fever-and-a-rash.html
http://www.bioportfolio.com/resources/pmarticle/1104909/Fifth-and-sixth-diseases-More-than-a-fever-and-a-rash.html