There is no specific definition in defining outbreak. According to Lai & Kwong, (2010), from the epidemiology view, an outbreak occurs if individuals develop similar symptoms one after another and the disease incidence is higher than usual. The general definition from Center Disease Control (CDC) defined an outbreak as the occurrence of more cases of disease than what is expected in a given area over a particular period of time. Different diseases possess their own outbreak definition. Dengue outbreak, for example, is defined as increase of cases per week persisting for at least 3 successive weeks to a level at least three times above the mean of previous 3 weeks (Runge-Ranzinger, Horstick, Marx, & Kroeger, 2008). Another definition obtained for dengue outbreaks is an increase in 2 SD above the mean ((Carme, et al., 2003; Oum, Chandramohan, & Cairncross, 2005; Rigau-Pérez, et al., 1998; Talarmin, et al., 2000)). In this study, the focus concentrates on the Malaysia dengue environment. Based on the study conducted by Seng, Chong, & Moore, (2005) the dengue outbreak was defined according to Johor Health State Department, which is an occurrence of more than one case in the same locality, where the date of onset between the cases are greater than 14 days. The outbreak is clear when there is no new case reported within 14 days.