How common is fifth disease?

I see clusters yrly: As an illness, fifth disease usually makes its rounds amoung the infant and toddler set . I see it in clusters, affecting one or another day care center or church nursery in waves, followed by months when no cases come in.A few years back we had a wave that affected toddlers, teens and a few adults, which was a bit unusual

Very common: In children, like all viral illnesses once you have it, it does not come back.