Abstract
The main transmission mechanism of the SARS-CoV-2 virus is airborne, particularly in poorly ventilated indoor environments. Recognizing the importance of this mechanism has taken a long time, despite the evidence generated by aerosol scientists from an early stage of the pandemic. Hence, measures applied more widely by the population have focused on the disinfection of surfaces, often in an exaggerated way, while measures focused on reducing the concentration of aerosols in indoor environments, such as adequate ventilation and air filtration, have been timidly promoted. In addition to the progress of the National Vaccination Plan, it is necessary to intensify transmission prevention measures for a safer reopening of the economy. It is therefore urgent, to educate and generate clear guidelines for the evaluation and improvement of ventilation in indoor spaces.
Highlights
The main transmission mechanism of the SARS-CoV-2 virus is airborne, in poorly ventilated indoor environments
In July 2020, a group of 239 scientists pointed out that, within the first six months of the pandemic, there was already evidence of the crucial role of a third transmission mechanism of the virus: aerosols. They called on the medical community, as well as national and international agencies and authorities, including the World Health Organization (WHO), to take preventive measures to reduce airborne transmission (Morawska et al, 2020)
Despite the evidence provided by the scientific community, the WHO (2021) recognized the transmission by aerosols only until April 2021
Summary
The main transmission mechanism of the SARS-CoV-2 virus is airborne, in poorly ventilated indoor environments. Aún falta claridad en las comunicaciones de la OMS y las autoridades sanitarias en todo el mundo sobre la importancia de las medidas que pueden ser más efectivas para reducir el riesgo de transmisión por aerosoles, particularmente en la evaluación y mejora de la ventilación y la filtración de aire en interiores.
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