limited immunity

例句：

1. 1. The vaccine provides a limited immunityagainst the virus.
   这种疫苗能提供有限的对病毒的保护。
2. 2. The patient's immunesystem was weakened due to the limitedimmunity of the vaccine.
   由于疫苗的有限免疫力，患者的免疫系统受到了削弱。
3. 3. The researchteam is working on developing a more effectivevaccine with a stronger limited immunity.
   研究团队正在努力开发一种更有效、更强免疫性的疫苗。