The question is "What happens after a vaccine is introduced into the body?"

问题在于,人体在接种疫苗后会发生什么样的变化

耶鲁公开课 - 生物医学工程探索课程节选

The memory cells, which are stimulated, lead to an IgG response and that's why IgG is the antibody of-- that is produced predominantly after the boost, but there is some IgM produced also.

记忆细胞受到刺激之后,可以诱发分泌IgG的应答反应,这也是为什么IgG,是接种疫苗后产生的主要抗体,与此同时也刺激产生了一些IgM

耶鲁公开课 - 生物医学工程探索课程节选