In the human population, susceptibles, S, are recruited at a rate m that equals to the per capita natural mortality rate for each group. This assumption is made to keep the population constant, while keeping a turnover of individuals in the population. We assume that a fraction b of the population has access to clean bore hole water and cannot become infected. Susceptible individuals without bore hole access become infected with the Hepatitis E virus at a rate bc, where b is the transmission rate of HEV from the contaminated environment c, to the human. This gives