While I know you're Cory and don't know what you're talking about 98% of the time, Christians did not mess up medical science. I'm not really sure why people are linking not wanting vaccinations to Christianity, but there is nothing wrong with getting vaccinations as a Christian at all.
Anyway, if you do your research, it was more often than not Christians that were advancing medicine/medical science. While it was not Christians that founded medical science as some falsely believe, they created a lot of good. Even the hospital movement was started by Christians. During the Dark Ages in the days of Feudalism only priests would experiment with science and medicine at all, aside from some high up officials for the King/Queen, etc. Nearly everyone else (about 98-99% of the population) were in the lower class as farmers.