The current number of latrines in Kitgum is 1,038 [11] . This implies one latrine per 27 people. According to the rules and regulations of Kampala City Council Authority, Building Inspection department, 1 latrine should be shared by a maximum of 5 people. We can use our estimated values of the basic reproduction number R 0 to determine the level of l and b that make R 0 v1. First, we use equation (9), the parameters in Table 2 , and the value of R 0~2 :11, (linear regression) Assume that contamination is due to insufficient latrines. Then, for R 0~1 , this method estimates that the latrine coverage should be increased to at least 17.1%. This translates into increasing the number of latrines from 1,038 to 4,796 (i.e. 3,756 extra latrines): 1 latrine per 7 people. Similarly, the boreholes should be increased from 23 to 230, that is, 17.7%, or 1 bore hole per 26 households. Similar results are obtained using R 0~2 :25 found from the non-linear fitting tool. In this case of Hepatitis E-only, the latrines should be increased to 16.1% and boreholes must cover 16.6% of the population. From the coinfection model, latrines should be increased to 17.5%: 4,908, (3,870 extra), 1 for 6 people. Boreholes should be increased to 18.1%, a total of 234, or 1 bore hole per 26 households.