Rothman, K. 2002. Epidemiology: An Introduction. Oxford Univ Press Woodward, M. 2004. 2nd ed. Epidemiology. Study Design and Data Analysis. Chapman & Hall.Vynnycky, E and R White. 2010. An Introduction to Infectious Disease Modelling. Oxford Univ Press. Materials that can be downloaded from these sites:1st part - General epidemiology:http://webpages.fc.ul.pt/~mcgomes/aulas/Epidemiologia%20LCS/index.html2nd part - Infectious diseases:http://webpages.fc.ul.pt/~mcgomes/aulas/ddi/index.html: