Well, it's the recommended method from the Danish Serum Institute (SSI), which resembles the CDC in the United States. (danish, pdf) http://www.ssi.dk/Smittebe

Well, it's the recommended method from the Danish Serum Institute (SSI), which resembles the CDC in the United States. (danish, pdf) http://www.ssi.dk/Smitteberedskab/Infektionshygiejne/Hent%20materiale/~/media/Indhold/DK%20-%20dansk/Smitteberedskab/Infektionshygiejne/PDF/Poster/Sept%202012%20Poster%20A4%20Haandvask%20nr%2011%202012.ashx http://www.ssi.dk/Smitteberedskab/Infektionshygiejne/Hent%20... Edit: That one is not specifically for flu, but too avoid infectious diarrhoea. We had a similar one at my job, specifically targeted against viral infections.