ANALYSIS OF RELATED FACTORS TO KNOWLEDGE, PRACTICE TO PREVENT HAND - FOOT - MOUTH DISEASES (HFMD) OF MOTHERS FOR CHILDREN UNDER 5 YEARS IN 3 COMMUNES, MY TU DISTRICT, SOC TRANG, 2015 Background: HFMD is a common infectious disease, transmission lines "fecal-oral" and direct contact, spreading from person to person, the disease usually occurs in children and likely to cause a major epidemic, caused by a group of intestinal enterovirus EV71 and CA16 included.