A prophylactic agent, device, or measure, such as a vaccine or drug.
A prophylactic agent, device, or measure, such as a vaccine or drug.
预防剂预防性的物质、器具或措施，比如疫苗或药物
A prophylactic agent, device, or measure, such as a vaccine or drug.
预防剂预防性的物质、器具或措施，比如疫苗或药物