In Thailand, HC can be found all year around. It is especially prevalent in the rainy season because the
rainfall will lead to wetness of all items which can then be contaminated by the virus. Also in rainy season, the
massive flooding in many rural areas leads to the children swimming in contaminated water. In urban areas
people make sure that swimming pools are clean and chlorinate before swimming. From the data of HC cases in
Thailand from 2002 to 2011, there were sporadic outbreak [4]. Usually however, the disease is found around
August (Atchaneeyasakul and Wiwannitikit, 2014). In this study, we look at the effect of rainfall on the
dynamics of the disease.