I. Epidemiology -- 1.1 The incidence of infectious disease under the influence of seasonal fluctuations -- 1.2 Some simple models of the population dynamics of eucaryotic parasites -- 1.3 Abstract model and epidemiological reality of Influenza A -- 1.4 Model of rabies control -- 1.5 Discussion -- II. Cell models -- 2.1 A Markovian configuration model for Carcinogenesis -- 2.2 Branching models for the cell cycle -- 2.3 Formal languages as models for biological growth -- 2.4 Graph rewriting systems and their application in Biology -- Discussion -- III. Pharmacokinetics -- 3.1 A mathematical model of erythropoiesis in man -- 3.2 Simulation of biochemical pathways and its application to Biology and Medicine -- 3.3 Some remarks on the physical basis of Pharmacokinetics -- 3.4 Mathematical models in the study of drug kinetics -- 3.5 On some applications of the eigenvector decomposition principle in pharmacokinetic analysis -- 3.6 A General Approach to Multicompartment Analysis and Models for the Pharmacodynamics -- Discussion