Fig. 3

Sustainability of Hand Hygiene Knowledge following Train-The-Trainers Courses Overall percentage (mean + 95% CI) of correct answers to the pre-, post- and follow-up test in three sites (Jalisco, Puebla and Madrid 5 months, 1 year and 2 years after the first Train-The-Trainers course, respectively) between June 2017 and August 2018