epidemiological indices of covid-19 viruses in countries with high-incidence: a descriptive and comparative analysis

Background: coronavirus disease 2019 (covid-19) has posed an unusual threat to global health. up to may 26, 2021, according to a report by the world health organization (who), 167.01 million cases, and 3.47 million deaths were reported. this study aimed to estimate and compare epidemiological indices of covid-19 in high-incidence countries.methods: we conducted a descriptive and comparative analysis intending to examine the epidemiological indices of covid- 19 in high-incidence countries, using the data published by the who until may 17, 2021. we calculated the incidence and mortality rate per 1,000,000 inhabitant-day at risk daily, weekly, and overall, using person-day as the denominator.results: the fatality rate in 14 countries was about 1.94%. the highest fatality rate was acquired in italy (2.99%), followed by the united kingdom (2.86%) and iran (2.79%). the lowest value on the fatality rate was in turkey and india, at 0.88% and 1.1%. the highest incidence rate was reported in the usa (207 cases per 1,000,000 person-day), followed by france (190), poland (171), and argentina (167). the highest mortality rate for the whole period was extracted in brazil (4.60 death per 1,000,000 population-day), and the lowest rate happened in india (0.42).conclusion: until may 17, 2021, covid-19 has affected about 117.6 million patients and caused 2.3 million deaths in 14 highincidence countries. this study shows that a specific pattern of covid-19 has been observed in every country.