Medical Applications of Nonadditive Entropies †

The Boltzmann–Gibbs additive entropy [Formula: see text] and associated statistical mechanics were generalized in 1988 into nonadditive entropy [Formula: see text] and nonextensive statistical mechanics, respectively. Since then, a plethora of medical applications have emerged. In the present review, we illustrate them by briefly presenting image and signal processings, tissue radiation responses, and modeling of disease kinetics, such as for the COVID-19 pandemic.