2) Epidemiological Models: Epidemic models represent powerful tools for gaining insight into how the dynamics of an epidemic are affected by interventions. In order to understand and control the spread of pathogens, it is essential to establish some of the key parameters associated with disease transmission. Fundamental to the dynamics of an epidemic are two quantities: the basic reproduction number (R0) and the generation time (Tg) of the pathogen [1] . The R0 is the average number of secondary cases produced by each primary case at the start of an epidemic in a previously unaffected population. The Tg is the average time between infection of index cases and the secondary cases they produce. The R0 is a measure of the transmissibility of the strain in the population, and largely determines the proportion of the population that will be infected in a pandemic. The ratio R0/Tg is a measure of an epidemic's rate of growth.