Before revision:  The model fits SARS-CoV-2 fatality rate across age and gender with high accuracy (r^2>0.9) . Rescaling the model parameters with the binding rates of the spike proteins of SARS-CoV and SARS-CoV-2 allows predicting the fatality rate of SARS-CoV across age and gender, in particular its higher severity for young patients, thus linking the molecular and epidemiological levels.
After revision:  The model fits SARS-CoV-2 fatality rate across age and gender with high accuracy (r^2>0.9) under the hypothesis that SARS-CoV-2 infections are in the dynamical regimes in which increased receptor slows down viral propagation. Moreover, rescaling the model parameters with the binding rates of the spike proteins of SARS-CoV and SARS-CoV-2 allows predicting the fatality rate of SARS-CoV across age and gender, in particular its higher severity for young patients, thus linking the molecular and epidemiological levels.