oral vaccine

• 口服疫苗

oral vaccine的用法和样例：

例句

1. The oral vaccine works because the ingestion of live virus mimics the natural process of infection, encouraging the production of antibodies in the gut.
   口服疫苗能够发挥效力是因为活病毒在机体吞入后可模拟天然感染过程，同时刺激消化道产生抗体。