Final answer:
Fifth disease is a mild illness characterized by fever, lymphadenopathy, and a maculopapular rash. It can cause complications such as arthritis and encephalitis.
Step-by-step explanation:
Fifth disease is a rare, typically mild illness characterized by fever, lymphadenopathy of the posterior cervical and suboccipital nodes, and a maculopapular rash that rubs on the face and spreads caudally. Potential complications include an acute arthritis that typically resolves within several weeks, thrombocytopenia, and encephalitis.