WHO says reviewing NYT article on concerns over airborne spread of Covid-19

Published July 6, 2020
“We are aware of the article and are reviewing its contents with our technical experts,” WHO spokesman Tarik Jasarevic said. — Reuters/File
“We are aware of the article and are reviewing its contents with our technical experts,” WHO spokesman Tarik Jasarevic said. — Reuters/File

The World Health Organisation (WHO) is reviewing a report that suggested its advice on the novel coronavirus needs updating, after some scientists told the New York Times there was evidence the virus could be spread by tiny particles in the air.

The WHO says the Covid-19 disease spreads primarily through small droplets, which are expelled from the nose and mouth when an infected person breaths them out in coughs, sneezes, speech or laughter and quickly sink to the ground.

In an open letter to the Geneva-based agency, 239 scientists in 32 countries outlined the evidence they say shows that smaller exhaled particles can infect people who inhale them, the newspaper said on Saturday.

Because those smaller particles can linger in the air longer, the scientists — who plan to publish their findings in a scientific journal this week — are urging WHO to update its guidance, the Times said.

“We are aware of the article and are reviewing its contents with our technical experts,” WHO spokesman Tarik Jasarevic said in an email reply on Monday to a Reuters request for comment.

The extent to which the coronavirus can be spread by the so-called airborne or aerosol route — as opposed to by larger droplets in coughs and sneezes — remains disputed.

Any change in the WHO's assessment of risk of transmission could affect its current advice on keeping one metre physical distancing.

Governments, which also rely on the agency for guidance policy, may also have to adjust public health measures aimed at curbing the spread of the virus.

“Especially in the last couple of months, we have been stating several times that we consider airborne transmission as possible but certainly not supported by solid or even clear evidence,” Benedetta Allegranzi, the WHO's technical lead for infection prevention and control, was quoted as saying in the New York Times.

WHO guidance to health workers, dated June 29, says that SARS-CoV-2, the virus that causes Covid-19, is primarily transmitted between people through respiratory droplets and on surfaces.

But airborne transmission via smaller particles is possible in some circumstances, such as when performing intubation and aerosol generating procedures, it says.

Medical workers performing such procedures should wear heavy-duty N95 respiratory masks and other protective equipment in an adequately ventilated room, the WHO says.

Officials at South Korea's Centres for Disease Control said on Monday they were continuing to discuss various issues about Covid-19, including the possible airborne transmission.

They said more investigations and evidence were needed.

Opinion

Editorial

Smog hazard
Updated 05 Nov, 2024

Smog hazard

The catastrophe unfolding in Lahore is a product of authorities’ repeated failure to recognise environmental impact of rapid urbanisation.
Monetary policy
05 Nov, 2024

Monetary policy

IN an aggressive move, the State Bank on Monday reduced its key policy rate by a hefty 250bps to 15pc. This is the...
Cultural power
05 Nov, 2024

Cultural power

AS vital modes of communication, art and culture have the power to overcome social and international barriers....
Disregarding CCI
Updated 04 Nov, 2024

Disregarding CCI

The failure to regularly convene CCI meetings means that the process of democratic decision-making is falling apart.
Defeating TB
04 Nov, 2024

Defeating TB

CONSIDERING the fact that Pakistan has the fifth highest burden of tuberculosis in the world as per the World Health...
Ceasefire charade
Updated 04 Nov, 2024

Ceasefire charade

The US talks of peace, while simultaneously arming and funding their Israeli allies, are doomed to fail, and are little more than a charade.