Furthermore, it was found that airborne emission of COVID-19 through the breathing zone of patients, particularly in ICU wards with confirmed cases of COVID-19, may be higher than in other ICU wards. In fact, the analysis of gene expression in ambient conditions and thereby aerosol transmission of SARS-CoV-2 through air is possible and may lead to occupational exposure of health care personnel. Based on the given results, airborne particles of COVID-19 may present in the air and affect the health of hospital personnel. The samples were analyzed using RT-PCR technique. Selection of sampling sections was in line with the WHO guidelines. Airborne particle sampling was performed using impingement method based on NIOSH (chapter BA) and ASHRAE. The present study aimed to measure the possible exposure of health care personnel to SARS-CoV-2 particles that may have been suspended in the air to respond to the hypothesis of COVID-19 airborne transmission. Some studies do not accept this method of transmission (COVID-19 airborne transmission). The present study examined the concentration of viral RNA-containing particles produced directly or indirectly by breathing or coughing of confirmed COVID-19 patients or by carriers without symptoms. The possibility of COVID-19 airborne transmission in indoor environments is debatable. The outbreak of SARS-CoV-2 (COVID-19) has attracted much attention to study its possible presence and airborne transmission.
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