“Better ventilating enclosed spaces is crucial in the fight against the virus”

INTERVIEW – Lidia Morawska, an aerosol specialist, believes more needs to be done to stem the epidemic.

Visualization of the flow of droplets produced by coughing and sneezing as part of the evaluation of the effectiveness of protective masks against aerosol splashes.
Visualization of the flow of droplets produced by coughing and sneezing as part of the evaluation of the effectiveness of protective masks against aerosol splashes. Sidddhartha VERMA / Manhar DHANAK / John FRANKENFIELD / Florida Atlantic University

Contamination grouped in a restaurant, a bus or during a dance class … The cases of propagation of the virus Sars-CoV-2 by air, multiply. Unlike droplets expelled by coughing, we are talking about aerosols here, lighter microparticles that can remain suspended in the air, and are emitted just by breathing. For Lidia Morawska, an aerosol specialist at Queensland University of Technology in Australia, this mode of propagation is not sufficiently taken into account. Main author of the letter sent by 239 international scientists to the WHO, she urges the international body to dictate an official recommendation to prevent this risk.

LE FIGARO. – Can we now quantify the proportion of Covid-19 contamination by air?

Lidia MORAWSKA. – There will never be a comprehensive answer explaining, out of the millions of cases, the percentage of those infected by air or those who were infected after having touched a

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