Open AccessAirborne spread of SARS-CoV-2 – a commentary by the Division of Internal Medicine, University Medical Centre Ljubljana
Author(s) -
Aleš Blinc,
Jadranka Buturović Ponikvar,
Zlatko Fras
Publication year - 2022
Publication title -
zdravniški vestnik
Language(s) - English
Resource type - Journals
eISSN - 1581-0224
pISSN - 1318-0347
DOI - 10.6016/zdravvestn.3274
Subject(s) - covid-19 , air filtration , medicine , pandemic , environmental health , aerosol , population , medical emergency , meteorology , indoor air quality , infectious disease (medical specialty) , geography , outbreak , virology , disease , pathology
Slovenia is one of the countries that have been most affected by the autumn/winter 2020/21 wave of the COVID-19 pandemic regarding the incidence and excess mortality among the general population as well as regarding the incidence among health care workers and nursing personnel. The World Health Organization has underestimated the importance of the airborne spread of SARS-CoV-2 and the recommended safety measures have not been entirely sufficient. When people breathe, talk, sing, cough, or sneeze, they emit respiratory droplets of various sizes, most of which are always smaller than 1 μm. Respiratory droplets smaller than 5 μm stay airborne in indoor spaces for a long time and travel over distances much longer than 2 m. Thus, an infected person in an indoor environment creates an infectious aerosol that may infect other people without close interpersonal contact. This short review presents the mathematical model and internet application by authors from the Massachusetts Institute of Technology for calculating the safe time before probable airborne infection occurs in indoor spaces. The importance of ventilation, air filtration, air humidity, and air disinfection by ultraviolet light is briefly discussed. The principles of preventing the airborne spread of SARS-CoV-2 are summarized.