noun
three Cs; three conditions facilitating infectious disease transmission (closed spaces, crowds, close contact)
Jocular term coined during the COVID-19 pandemic, blending the concepts of 集合 (gathering), 近接 (proximity), and 閉鎖 (enclosure). Also a pun on the name Xi Jinping (習近平) due to the identical Japanese reading.
See also: 3密
感染予防のため、集近閉を避けるように呼びかけられた。
To prevent infection, people were urged to avoid the three Cs.