The great annual epidemics (flu, gastroenteritis ...) are, in collective use places, essentially carried through door handles. Ulna checks the first relay stick of the contamination chain through hands. |
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A survey proves that Ulna's system is definitely used 89% of the time, and it leads to a significant difference of contamination in Ulna's handles favour. (publication: Poster SFHH 2007 - Dr J.C Séguier) |
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