- Who
- Salem District Administration, Rohini R Bhajibhakare
- What
- 4024 people
- Where
- India (Salem)
- When
The largest hand hygiene lesson consists of 4,024 participants, achieved at an event organised by Salem District Administration and Rohini R Bhajibhakare (both India), in Salem, Tamil Nadu, India, on 15 October 2018.
This attempt took place on global hand washing day.