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In page Cowpox:

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In later years, Jenner popularized the experiment, calling it a vaccination from the Latin for cow, vacca. The number of vaccinations among people of that era increased drastically. It was widely considered to be a relatively safer procedure compared to the mainstream inoculation. Although Jenner was propelled into the spotlight from the vaccination popularity, he mainly focused on science behind why the cowpox allowed persons to not be infected by smallpox. The honour of the discovery of the vaccination is often attributed to Benjamin Jesty, but he was no scientist and did not repeat or publish his findings. He is considered to be the first to use cowpox as a vaccination, though the term vaccination was not invented yet.[citation needed]