COVID-19 is more deadly and more contagious than seasonal flu and may also cause long-lasting damage to survivors
The infection fatality ratio (IFR) indicates the proportion of people who die from a disease among all people infected, including both confirmed cases as well as undetected infections. The claim that COVID-19 is no more dangerous than the flu is based on a misinterpretation of the WHO’s estimate that a maximum of 10% of the global population has been infected by the virus that causes COVID-19. Calculating IFR with the upper bound of the WHO’s estimate and recent infection data underestimates the global COVID-19 IFR, which according to current estimates, is at least ten times higher than that of the flu. In addition to lethality, its global distribution, lack of vaccines or effective treatments, and potential long-term damage to survivors make COVID-19 a more significant danger compared to the flu.