Thus, the Government decided to conduct the supplementary immunization activity for people aged 18-30 years in May 2016. Of the reported cases of enterovirus disease, 83 per cent occurred in children who were younger than 10 years and 10 per cent of those infected were younger than 1 year. Hygiene promotion activities were performed by volunteers and staff of the Mongolian Red Cross Society in order to deliver important messages to the public about the prevention of this disease.