Panel A shows symmetric, icosahedral particles, about 25 nm in diameter, and empty capsids (arrowheads) in serum from an infected person (courtesy of Dr. Y. Cossart, ×189,000). Panel B shows human ...

Parvovirus B19, often called the "fifth disease virus," is more than just a childhood infection. This tiny, elusive virus can cause a range of symptoms, from a mild rash to serious health ...