On shifting disease presentation

We need to investigate the prevalence of several infectious diseases in the aftermath of the Covid-19 pandemic.

After a series of Covid-19 waves, several known infectious diseases are known to have appeared with unknown presentations or in more severe forms. Tomato flu, severe acute hepatitis of unknown origin in children, multisystem inflammatory syndrome in children, monkeypox virus and dengue virus are some of those diseases that appeared either with initially unknown etiology (as mysterious diseases) or in a more severe form after Covid-19. Could these unprecedented shifting presentations be a coincidence or an impact of Covid-19?