Our vet is very efficient; he sends us a reminder when the cat is due for a booster vaccination as a matter of course.
我们的兽医工作效率很高, 当猫要按时免疫接种时, 他总给我们寄一张提醒单来。
I'm immune to smallpox as a result of vaccination.
我种过牛痘了, 所以对天花有免疫力.
Induced by vaccination.
因种痘引起的