N Eyvazzadeh - Department of Medical Bacteriology, Faculty of Medicine, Qazvin University of Medical Science, Qazvin, Iran
A Letafati - Department of Virology, School of Public Health, Tehran University of Medical Sciences, Tehran, Iran
A Gharehkhani - Department of Medical Laboratory Science, Faculty of Para Medicine, Islamic Azad University, Tehran Medical Branch, Tehran, Iran
E Khodadoust Soufiani - Department of Medical Laboratory Science, Faculty of Para Medicine, Islamic Azad University, Tehran Medical Branch, Tehran, Iran
Z Zargari - Department of Microbiology, Faculty of Basic Sciences, Karaj Branch Islamic Azad University, Karaj, Iran
F Zargari - Department of Cellular and Molecular Biology, Faculty of Modern Science, Islamic Azad University, Tehran Medical Branch, Tehran, Iran
N Hezarpisheh - Department of Genetics, Faculty of Advanced Sciences and Technology, Islamic Azad University, Tehran Medical Sciences Branch, Tehran, Iran
T Beheshti - Department of Genetics, Faculty of Advanced Sciences and Technology, Islamic Azad University, Tehran Medical Sciences Branch, Tehran, Iran
E Andalib - Department of Microbiology, Faculty of Basic Sciences, Islamic Azad University Science and Research Branch, Tehran, Iran
N Farajvand - Department of Biological Sciences and Technologies, Faculty of Basic Sciences, Islamic Azad University, Yadegar-e-Imam Khomeini Branch, Tehran, Iran
M Pourghasemi - Department of Biology, Faculty of Basic Sciences, Islamic Azad University, Kazerun, Iran
Z Bagherian - Department of Biology, Faculty of Science, Payam-e-Noor University, Takab, Iran
Sh Abdizadeh - Department of Microbiology, Faculty of Modern Sciences, Islamic Azad University, Tehran Medical Sciences Branch, Tehran, Iran
M Ahmadinousaabad - Department of Genetic engineering, Faculty of Genetics, Islamic Azad University, Qaemshahr Branch, Mazandaran, Iran
S Niksirat Aghdam - Department of Biology, Faculty of Sciences, Islamic Azad University, Qods Branch, Qods, Iran

Background and Objective: In humans, viruses cause respiratory infections that are usually mild, including the common cold, or sometimes it can be fatal. The outbreak of coronavirus disease ۲۰۱۹ (COVID-۱۹) occurred in Wuhan, China was more expansive than initially estimated, with cases now confirmed in several countries. Therefore, it is crucial to determine the clinical symptoms of COVID-۱۹ in different age groups. Methods: This cross-sectional study evaluated the presence of SARS-CoV-۲ infection in ۲۱۹ throat and nasal swab samples using Real-time PCR. All samples were collected from people with respiratory symptoms who went to the grand bazaar. Findings: Of ۲۱۹ patients examined, ۱۹ (۸.۶%) positive cases out of ۲۱۹ for SARS-CoV-۲ were found by using Real-time PCR. Among these ۱۹ positive cases of SARS-CoV-۲, ۶ (۲.۷%) were under ۵, ۳ (۱.۳%) were between ۵-۱۸, ۴ (۱.۸%) were between ۱۸-۵۰ and ۶ (۲.۷%) were over ۵۰ years old respectively. Most common symptoms in positive group was cough (۸۹%) and despite other age groups, in patients over ۵۰ years old, myalgia and diarrhea was common. Conclusion: It seems that SARS-CoV-۲ symptoms can vary in different age groups but unlike other age groups, in elderly, uncommon symptoms like eyes redness, myalgia and diarrhea seems is seen following COVID-۱۹ infection

Respiratory Infection, Diarrhea, Myalgia, COVID-۱۹, SARS-CoV-۲