His remedy to the problem is surprisingly simple: a checklist of ICU protocols that directs physician sanitary practices (e.g. hand-washing). Hospitals that have put Pronovost’s checklist into practice have had immediate success, reducing hospital-infection rates somewhere between (estimates vary) well over a third to a whopping two-thirds within the first few months of its adoption. Yet as the story goes, many physicians have rejected this solution and Pronovost has struggled to persuade hospitals to adopt his reform.