Impressively, the molecular description of SARS-CoV-2 was achieved in weeks and the first vaccinations, in less than a year after the first cases of covid-19. But although medicine is becoming less art and more science, it continues to have a degree of uncertainty that is obviously more important in new and especially population-based phenomena, since biological, behavioral, logistical and political-social factors intervene. Whether out of ignorance or out of interest, during the beginning of the pandemic some of the statements by politicians, experts or would-be experts now make more than one blush.
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