一种疫苗是否激发有效的免疫应答除决定于抗原本身的性质外 ,另一个重要的因素是能被抗原提呈细胞提呈给Ｔ细胞的抗原的数量。疫苗通过常规的接种方法如皮下注射或者肌肉注射进入体内 ,抗原首先被位于组织内的大量的树突状细胞捕获 ,然后被树突状细胞带到局部引流淋巴结。在淋 Whether or not a vaccine elicits an effective immune response depends on the nature of the antigen itself and another important factor is the amount of antigen that can be presented to T cells by antigen presenting cells. Vaccines enter the body by conventional methods of vaccination, such as subcutaneous injection or intramuscular injection. Antigens are first captured by a large number of dendritic cells located in the tissue and then taken to local draining lymph nodes by dendritic cells. In the shower