noun
serum injection
Medical term for injecting blood serum, typically for therapeutic or prophylactic purposes.
破傷風の予防に血清注射を受けた。
I received a serum injection to prevent tetanus.
ワクチン接種 refers to vaccination, which stimulates the body's own immune response, while 血清注射 introduces ready-made antibodies.
Compound of 血清 (blood serum) and 注射 (injection).