After denying it for a long time, The WHO recognized this time that Covid-19 can be spread through the air and not only through direct contact with contaminated matter. This makes this coronavirus potentially more dangerous since its transmission mechanisms are more aggressive.

Through a official document, in which the modes of transmission of the Sars-CoV-2 virus are fully detailed, it is explained that this coronavirus can stay airborne for several minutes with significant viral load, which will make the person who inspires it become infected.

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This update comes after they were detected infections in closed spaces such as restaurants, nightclubs, churches and offices, where people talk regularly and expel viruses in the form of aerosols.

However, the document is also very specific in that contagion through the air occurs in very particular conditions, in which there is insufficient ventilation for aerosols to be expelled from the site where are people at risk of being infected.

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With this, a wide risk possibility is also opened in the way in which many countries have begun the integration and reactivation of the economy in the new epidemiological context, because with a number of infected, with symptoms of different degrees as well as asymptomatic, numerous , any activity in closed spaces is prone to generating a regrowth.

Until before this time, contagion through aerosols was only accepted and recognized within hospitals in intubated patient situations. However, this is also happening in common situations that are happening right now in many countries of the world.

A route of contagion through the air means that there is no safe distance, or “healthy distance” as it has been named in Mexico.Therefore, protocols to avoid the rise of the epidemic curve worldwide will have to adapt to this new discovery.

Many studies have shown that the mere act of speaking is enough to expel saliva particles into the air that aerosols generate, the same as in a person infected with Covid-19 they will infect the ambient air with enough viral load to infect the people around him, regardless of whether they are more than a meter and a half away, in addition to that this can not be avoided with common mouthguards.


However, the use of any type of protection for air filtration will be essential in any context and situation. Likewise, the WHO fully recommends that well-ventilated places cannot be activated during all this time, it also instructed that air conditioning systems have external ventilation systems so that contaminated air does not recirculate within crowded spaces.