" After every patient left, the doctor would come outside and make a show of washing his needle with water from the drum. This was his way of signaling that he was being careful. We do not know whether he actually infected anyone with his syringe, but doctors in Udaipur talk about a particular doctor who infected an entire village with Hepatitis B by reusing the same unsterilized needle. "

― Abhijit V. Banerjee , Poor Economics: A Radical Rethinking of the Way to Fight Global Poverty