Hand Hygiene: Why Rubbing Alone Doesn't Kill Germs

Friction from rubbing hands removes some microbes mechanically but does not kill most bacteria/viruses.

Effective Hand Hygiene

1. Soap and water (gold standard): Surfactants disrupt lipid envelopes, emulsify soil; mechanical action + rinsing physically removes pathogens. ≥20 seconds.
2. Alcohol-based hand rub (ABHR): ≥60% ethanol/isopropanol denatures proteins, disrupts membranes. Apply palmful, cover all surfaces, rub until dry (≥20 sec).

Why Rubbing Alone Fails

• No chemical disruption of microbial envelopes/capsids.
• No removal mechanism (no rinse).
• Transient flora may spread; resident flora largely unaffected.

When to Use Which

• Soap/water: Visibly soiled, after bathroom, before eating, C. difficile, norovirus, Bacillus spores.
• ABHR: Routine clinical use, before/after patient contact, when sinks unavailable.

Common Errors

• Insufficient time (<15 sec)
• Missing thumbs, fingertips, between fingers, wrists
• Wiping off before dry (ABHR)
• Using expired/low-alcohol product

Proper technique > product choice. Audit and feedback improve compliance.