1. International health regulations. World Health Organization. 2006. Available at: http://www.who.int/csr/ihr/en/. (Accessed 2008 Mar 20)
2. World Health Organization. International travel and health. 2007 Ed. Geneva: WHO, 2007.
3. The Revised International Health Regulations and Their Relevance to Travel Medicine
4. Sanders EJ Marfin AA Tukei PM , et al. First recorded outbreak of yellow fever in Kenya, 1992‐1993. I. Epidemiologic investigations. Am J Trop Med Hyg 1998; 59:644–649.
5. Coldren RL Ofula VO Prosser TJ , et al. Arboviral IGG antibody prevalence in three Kenyan districts. Washington: The American Society of Tropical Medicine and Hygiene, 2005.