Fig. 1
From: ECMO use in COVID-19: lessons from past respiratory virus outbreaks—a narrative review
Geographical distribution in previous viral outbreaks with the name of viral outbreaks and onset year. The number of infected cases (coloured bar) and number of deaths (blank bar) with percentage of death are described under each map. The length of the bars represent the approximate ratio of infected cases to deaths. The geographic distribution in COVID-19 is not expressed in this figure since the numbers and countries are still changing. As of May 19, 2020, total infected numbers of cases are over 4,700,000 and over 310,000 (6.6%) died of COVID-19. SARS Severe acute respiratory syndrome; MERS Middle East respiratory syndrome; COVID-19 Coronavirus disease 2019