: Coronaviruses are a group of viruses that can cause range symptomsincluding runny nose, cough, sore throat and fever. Some mild, such as the common cold, whileothers more likely to lead pneumonia. They usually spread through direct contact with aninfected person it causes severe illness in around quarter cases be deadly).

background : main technique to control acquired immunodeficiency syndrome (hiv) infection is the effective preventive programs among high-risk groups. modeling is one of the effective methods where there is inadequate data. we used the modes of transmission (mot) model to predict the transmission of hiv infection in iran. methods : we systematically searched published and grey literature to fin...