id author title date pages extension mime words sentences flesch summary cache txt cord-254339-djmibi3a Griette, Quentin Unreported Cases for Age Dependent COVID-19 Outbreak in Japan 2020-06-17 .txt text/plain 5621 439 65 In particular, we build a new mathematical model and a new computational method to fit the data by using age classes dependent exponential growth at the early stage of the epidemic. We fit this model to the observed data and obtain a snapshot of the effective transmissions occurring inside the population at different times, which indicates where and among whom the disease propagates after the start of public mitigation measures. [17] also discuss age-related effects in the control of the COVID epidemic, and use statistical inference to fit an age-structured SIR variant to data; the model is then used to discuss the efficiency of different control strategies. One of the difficulties in fitting the model to the data is that the growth rate of the epidemic is different in each age class, which lead us to adapt our early method presented in Liu et al. ./cache/cord-254339-djmibi3a.txt ./txt/cord-254339-djmibi3a.txt