Until late in the 19th century, physicians often worked on corpses and then on living patients ​ — without washing their hands in between. That practice caused many deaths.
पुराने ज़माने में डॉक्टर शव छूने के बाद बिना हाथ धोए दूसरे मरीज़ों का इलाज करने लगते थे ।