No magic wand is going to work with this virus… The only thing magical about Erythema Infectiosum, is the rash appearing out of nowhere. Erythema Infectiosum is a virus, aka Fifth Disease, and also “slapped cheek” disease. If you’re a HP fan, you understand my enthusiasm with the verbiage. Here’s an interesting fact about Erythema … More Erythema Infectiosum… Kinda sounds like a Harry Potter spell, so what is it??