4 ms·
Hand washing would be a difficult sell, even as late as the 19th century: http://en.wikipedia.org/wiki/Ignaz_Semmelweis http://en.wikipedia.org/wiki/Ignaz_Semme
by nzmsv 17y ago
Hand washing would be a difficult sell, even as late as the 19th century: http://en.wikipedia.org/wiki/Ignaz_Semmelweis http://en.wikipedia.org/wiki/Ignaz_Semmelweis