We decided to examine suspected samples of pneumonia outbreak caused by the new coronavirus SARS-CoV-2 and provide information about the mortality rate due to this infection in different age groups in Iran. In this descriptive-cross-sectional study, a total of 784 samples of naso/oropharyngeal swabs of suspected patients with COVID-19 symptoms who had referred to Imam Khomeini, Shahid Fayaz-Bakhsh and Modarres hospitals in Tehran from February 24, 2020 to March 24, 2020 were examined by RT-PCR method. The highest incidence of the disease was within the age group of 50– 59 years, while the lowest rate was in the 0–9 years age group. The highest rate of positive samples in terms of COVID-19 among suspected individuals was for patients > 80 years of age (89%) and the highest mortality rate was in the age range of 70–79 years (31%) and > 80 years (30), respectively. In terms of recovery, the highest rate was in the 30–39 years age group (65.2%). Statistical analysis showed that mortality significantly increased in the age group of > 60 years old and in fact, mortality was significantly associated with older ages. According to the results of the current study, the prevalence of COVID19 in lower age (0–9 years old) is lower and mortality rate is higher in older ages as significant increase in mortality was observed in those aged > 60 years old. However, further epidemiological studies on a larger study population in different regions of Iran are needed to explain the prevalence, clinical features, and course of the disease.


My name is Hamidreza Kalantari. I am a PhD student in Microbiology in the university of Shahr-e- Qods, Tehran, Iran. I have passed my theoretical part of the PhD program. Currently, I work on my thesis that is about the vaccine of Pseudomonas aeruginosa. Also, during the pandemic of COVID-19, I researched on SARS-CoV-2 that two articles about it were published.
1- Kalantari H, Tabrizi AHH, Foroohi F. Determination of COVID-19 prevalence with regards to age range of patients referring to the hospitals located in western Tehran, Iran. Gene reports.
2- Tabrizi AHH, Kalantari H, Foroohi F. Evaluation of the effectiveness of various drugs in the treatment of COVID-19, New Cell Mol Biotech. j.11/42 , 2021.