vaccinator

noun [专属名词]牛痘接种员；种痘刀

He had never been vaccinated despite having once served as a vaccinator and despite having worked at the hospital where employee vaccinations were supposed to be mandatory.
虽然他曾经作为种痘员工作过，而且还在医院工作，而在那里雇员种痘是强制的，但他却从未种过痘。