noun
triple vaccine; DPT vaccine
Specifically refers to the combined vaccine for diphtheria, pertussis (whooping cough), and tetanus. Commonly used in medical and parenting contexts.
赤ちゃんは生後3か月で三種混合の予防接種を受ける。
Babies receive the DPT vaccination at three months old.
Compound of 三種 (three kinds) and 混合 (mixture, combination), referring to the three vaccine components.