RESEARCH SITUATION SEVERE DIARRHEA IN CHILDREN UNDER 5 YEARS IN NGA SAU TOWN, CHAU THANH DISTRICT, HAU GIANG PROVINCE 2014 The method described cross-sectional study from 6/2014 to 12/2014 at Nga Sau town, Chau Thanh district, Hau Giang province with results as follows: Prevalence of child diarrhea in the two weeks of the child under 5 years old in the town of Nga Sau, Chau Thanh district, Hau Giang province was 14.7%.