What is hand hygiene?
It’s more than washing up. Here’s what hand hygiene means, why it matters so much in hospitals, and what the numbers say.
Three parts, one habit
Wash
Soap and water lifts germs, dirt and chemicals off your skin and rinses them away. Scrub for at least 20 seconds.
Sanitize
A hand rub with at least 60% alcohol kills many germs in seconds when you can’t get to a sink.
Protect your skin
Cracked, sore skin holds more germs and makes hand hygiene painful, so people skip it. Moisturizing is part of the job.
Why it matters in hospitals
Healthcare-associated infections (HAIs), also called nosocomial infections, are infections patients pick up while being treated for something else. In CDC’s latest national survey, about 1 in 38 U.S. hospital patients had at least one on a given day in 2023, an estimated 518,000 infections that year. The most common were pneumonia, surgical site infections and gastrointestinal infections.
Hands are how many of those germs travel. A nurse checks one patient, touches a bed rail, then helps the next patient. Germs such as MRSA can live on those surfaces, and many hospital patients are too sick to fight them off. WHO estimates that strong infection prevention programs, with hand hygiene at their center, can prevent 70% of these infections.
The numbers
- 1 in 38
U.S. hospital patients had an HAI on a given day in 2023, down from 1 in 31 in 2015.
CDC, 2026 - 40%
Median hand hygiene compliance among hospital staff across 96 studies.
Erasmus et al., 2010 - 16.9% → 9.9%
Drop in hospital infections at Geneva University Hospitals when compliance rose from 48% to 66%.
Pittet et al., 2000
Quick questions
Is hand hygiene the same as handwashing?
Handwashing is one part of it. Hand hygiene also includes using alcohol-based hand sanitizer and caring for your skin. In hospitals, sanitizer is used more often than soap for routine care.
Why don’t healthcare workers always clean their hands?
The usual reasons are time pressure, sore or cracked skin from constant washing, a sink or dispenser that isn’t close by, and simply forgetting. Putting alcohol rub within reach is one of the changes that has made the biggest difference.
Does hand hygiene really prevent infections?
Yes. When Geneva University Hospitals raised compliance from 48% to 66%, the share of patients with a hospital-acquired infection fell from 16.9% to 9.9%. WHO estimates that strong infection prevention programs, including hand hygiene, can prevent 70% of healthcare-associated infections.
- CDC. New CDC data shows decline in healthcare-associated infections. July 15, 2026 (NEJM survey of 2023 data).
- WHO. First global report on infection prevention and control. May 6, 2022.
- Erasmus V, et al. Compliance with hand hygiene guidelines in hospital care: a systematic review. Infect Control Hosp Epidemiol. 2010;31(3):283-294.
- Pittet D, et al. Effectiveness of a hospital-wide programme to improve compliance with hand hygiene. Lancet. 2000;356:1307-1312.
- Boyce JM, Pittet D. Guideline for Hand Hygiene in Health-Care Settings. MMWR. 2002;51(RR-16).
- WHO. Guidelines on Hand Hygiene in Health Care. 2009.