Health experts believe the state could be paying a steep "immunity debt." ...

Human parvovirus B19 - also known as fifth disease or erythema infectiosum - is a common childhood infection causing a rash and flu-like symptoms. The name sounds more ominous than the infection is.

Fifth disease – so called because it was the fifth red-rash childhood disease to be identified – is generally a mild illness that most commonly affects preschool and school-age children. It's also ...