The World Health Organization defines five specific moments when healthcare workers should clean their hands to stop the spread of infection.
Why the five‑moment model matters
Hands are the most common vehicle for moving bacteria, viruses and fungi between patients, equipment and the environment. By tying hand hygiene to concrete steps in patient care, the model makes it easy to remember when cleaning is required, which in turn lowers healthcare‑associated infection rates.
Moment 1 – before touching a patient
Clean hands before any direct contact prevents transient organisms picked up from surfaces or previous patients from reaching the new patient’s skin, mucous membranes or wounds.
Moment 2 – before aseptic tasks
Any procedure that could introduce microbes into a normally sterile site—such as inserting a catheter, giving an injection, or dressing a wound—requires hand hygiene right before the task. This protects the patient from the most serious infections.
Moment 3 – after body fluid exposure risk
Even if no visible fluid is seen, any activity that might expose the worker to blood, urine, sputum, vomit or other bodily fluids calls for immediate hand cleaning. This removes any contaminant that could be transferred later.
Moment 4 – after touching a patient
After any physical interaction, hands may now carry the patient’s own flora, some of which can be opportunistic pathogens. Cleaning at this point stops cross‑contamination to the next patient or to the environment.
Moment 5 – after touching patient surroundings
Contact with surfaces such as bedside rails, monitors, or medical equipment can re‑contaminate hands. Hand hygiene after leaving the patient area prevents those microbes from being carried elsewhere.
Choosing the right product
Alcohol‑based hand rubs (60‑80% ethanol or isopropanol) are preferred for most moments because they act quickly, require no water, and are less irritating than soap. Soap and water remain essential when hands are visibly soiled or after exposure to spore‑forming organisms like Clostridioides difficile.
Putting the moments into practice
Effective implementation relies on education, visible reminders (posters at each bedside), and easy access to dispensers. Audits and feedback help maintain compliance, and leadership support reinforces the habit.