The purpose of this paper is to provide a review of the current state of fuzzy logic theory in epidemioloy, which is a recent area of research. We present four applications of fuzzy logic theory in epidemic problems, using linguistic fuzzy models, possibility measure, probability of fuzzy events and fuzzy decision making techniques. The results demonstrate that the applications of fuzzy sets in epidemiology is a very promising area of research. The final discussion sets the future stage of fuzzy sets application in epidemiology.
['Eduardo Massad', 'Neli Regina Siqueira Ortega', 'Claudio J. Struchiner', 'Marcelo Nascimento Burattini']
Fuzzy epidemics