the degree of risk for major infectious diseases is high.such as bacterial and protozoal diarrhea, hepatitis, and typhoid fever, dengue fever and malaria, leptospirosis.

• 主要疾病感染的危险程度也处于高级状态:比如细菌性和原虫性下痢，肝炎，伤寒热，骨痛热，疾病，细螺旋体病等。