The recent changes in COVID-19 symptoms suggest convergent evolution of respiratory diseases. This process is analogous to the emergence of animal mimetic complexes and complements previously identified types of mimicry. A novel pathogen might go unnoticed or insufficiently counteracted if it resembles a disease that the host already faced on multiple occasions, which creates a selective pressure towards a typical symptomic phonotype. In short, the reason why so many unrelated pathogens cause similar symptoms may correspond to the reasons that drove the evolution of the 'warning' wasp-like colouration in various insect species.

Center for Theoretical Study Charles University and Czech Academy of Sciences Jilská 1 110 00 Prague 1 Czech Republic

Department of Philosophy and History of Science Faculty of Science Charles University 128 00 Prague 2 Czech Republic

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