They successfully explained age-specific patterns of infection such as varicella-zoster virus, parvovirus B19, mumps, influenza and pertussis. They are easy to use, capture social interaction in a wide range of settings and do not rely on peer-group participants. Contact diaries have several advantages in measuring of the frequency and intensity of contacts between individuals. For instance, social contact data studies have shown better goodness-of-fit than mathematical and parsimonious models on seroprevalence data for varicella. While most models make assumptions on transmission parameters, social contact data studies estimate the probability of contacts between individuals, and consequently of potential pathogen transmission. Rate the app and send us your feedback - we will use it to improve our service.Mathematical modelling of infectious diseases is invaluable to evaluate control and prevention strategies by comparing their (cost-)effectiveness and to inform public health decision makers. Find France 24’s exclusive reports and feature programmes.

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