Electron micrograph of negatively stained Parvovirus B19 in blood. Each virus particle is about 25 to 30nM in diameter. Credit: GrahamColm/CC BY 3.0 Electron micrograph of negatively stained ...
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.