Fifth disease, which mostly affects children, causes a bright red rash on the cheeks. The virus parvovirus B19 spreads through respiratory droplets and is most contagious at the onset of symptoms. You ...

Understanding the Context

KCRW: What to know about the 'slapped cheek' virus uptick in the U.S. What to know about the 'slapped cheek' virus uptick in the U.S. If you slap something onto a surface, you put it there quickly, roughly, or carelessly. The barman slapped the cup on to the waiting saucer.

Key Insights

[V n + on/onto] If you slap someone, you hit them with the palm of your hand. He would push or slap them once in a while. I slapped him hard across the face.