Study aim: The effect determination of bergamot seeds-extracted methanolic extract containing steroidal glycosides with propolis for treatment of patients with acute respiratory infection including patients with or suspected of covid-19 into clinical trial Design: - The testing process is two-headed blind, meaning that 25 patients receive the product (dried methanolic extract with propolis) and another 25 patients receive placebo. Physician and patient have not information about received medicine and patients receiving placebo are also placebo. Settings and conduct: Outpatients in Kashan Akhavan Clinic and 16-hour centers of Sepehri and Shahid Beheshti Hospital, Kashan University of Medical Sciences, Kashan, Iran Participants/Inclusion and exclusion criteria: Inclusion criteria: 1. Patients who, in addition to acute respiratory illness. 2. The patient's ability and its personal desire to fill out of personal consent form to enter the study Output Criteria: 1. Pregnancy and lactation 2. Heart and mental patients Intervention groups: Patients with acute respiratory infection (covid-19 suspected or suspected) Main outcome variables: Clinical symptoms include dry cough, shortness of breath, fever and chills.