noun
BCG stamp injection; multi-needle injection
Colloquial term for the BCG vaccination method using a multi-needle stamp, leaving a pattern resembling a ハンコ (seal).
子供の頃、ハンコ注射を受けた跡がまだ残っている。
I still have a scar from the BCG stamp injection I got as a child.
ハンコ注射は結核予防のために行われます。
The stamp injection is given to prevent tuberculosis.