水痘

1. Origins, structure, and basic meaning

• Structure: 水痘 (すいとう) is the disease name chickenpox. It appears as terminology and as the subject of infection spread.
• Basic usage: School-infirmary material confirms the disease name; in a story, its spread closes a school.

2. Common pitfalls and similar expressions

• Disease label in reference material and outbreak causing closure
  • 水痘という病名 checks terminology; 水痘が広がる describes an epidemic event. The noun names the disease, not one symptom.