Back in the 19th century, when Ignaz Semmelweis suggested that washing hands was a good idea, he met a lot of resistance. From wikiepedia, "Some doctors, for in

Back in the 19th century, when Ignaz Semmelweis suggested that washing hands was a good idea, he met a lot of resistance. From wikiepedia, "Some doctors, for instance, were offended at the suggestion that they should wash their hands, feeling that their social status as gentlemen was inconsistent with the idea that their hands could be unclean". https://en.wikipedia.org/wiki/Ignaz_Semmelweis https://en.wikipedia.org/wiki/Ignaz_Semmelweis