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Glossary

Concentration of microorganisms

Describes the number of microorganisms in a certain area.

Concentration of microorganisms — Microorganism density on different skin areas of the hands

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International Campaign Days

Campaign days raise awareness of the importance of cleaning and disinfecting hands and surfaces in the health sector, addressing sepsis and antibiotic resistance. Find all information about these annual events here.

International campaign day: World Hand Hygiene Day on 5 May 2025

Two hands touching. Other hands in the background.

On May 5, 2025, as every year, the WHO is reminding people of the importance of hand hygiene in the healthcare sector and beyond.