例如：At present,no widely approved vaccine exists for malaria.
They vaccinate our children and help us to recover when we are sick.
例如： we all should be vaccinated against COVID-19.
This may eventually lead to routine inoculation of children .
The annual jab fest for the seasonal flu is already underway.
例如：First vaccine can stimulate our immunity 激發免疫力
and confer immunity on our body 賦予我們免疫力
then it also spark on immune response.激發免疫反應