The Coronavirus Can Be Airborne Indoors, W.H.O. Says

"We have been talking about the possibility of airborne transmission and aerosol transmission as one of the modes of transmission of COVID-19," Maria Van Kerkhove, technical lead on the COVID-19 pandemic at the WHO, told a news briefing."

• The World Health Organization has acknowledged that there's possibility of coronavirus being spread in the air under certain conditons


• The UN body releases new guidelines on COVID-19 transmission, including new scientific evidence available on the spread of the SARS-CoV-2

The coronavirus may linger in the air in crowded indoor spaces, spreading from one person to the next, the World Health Organization acknowledged on Thursday.

The W.H.O. had described this form of transmission as doubtful and a problem mostly in medical procedures. But growing scientific and anecdotal evidence suggest this route may be important in spreading the virus, and this week more than 200 scientists urged the agency to revisit the research and revise its position.

In an updated scientific brief, the agency also asserted more directly than it had in the past that the virus may be spread by people who do not have symptoms: “Infected people can transmit the virus both when they have symptoms and when they don’t have symptoms,” the agency said.

The W.H.O. previously said asymptomatic transmission, while it may occur, was probably “very rare.” Some experts said both revisions were long overdue, and not as extensive as they had hoped.

“It is refreshing to see that W.H.O. is now acknowledging that airborne transmission may occur, although it is clear that the evidence must clear a higher bar for this route compared to others,” Linsey Marr, an aerosol expert at Virginia Tech, said in an email.

An aerosol is a respiratory droplet so small it may linger in the air. In its latest description of how the virus is spread, the agency said transmission of the virus by aerosols may have been responsible for “outbreaks of Covid-19 reported in some closed settings, such as restaurants, nightclubs, places of worship or places of work where people may be shouting, talking or singing."

The guidelines stated that understanding how, when and in what types of settings the SARS-CoV-2 virus spreads between people is critical for developing effective public health and infection prevention measures to break chains of transmission. WHO said current evidence suggests that COVID-19 transmission occurs primarily through direct, indirect, or close contact with infected individuals through their saliva and respiratory secretions, or through their respiratory droplets expelled when they cough, sneeze, talk or sing. The agency also said that asymptomatic people can also spread the virus to others, although it is still unclear to what extent this occurs and more research is needed in this area.

WHO stressed that high-quality research is urgently needed to understand the role of airborne spread of the SARS-CoV-2 transmission in the absence of aerosol-generating procedures, the dose of virus required for transmission to occur, the settings and risk factors for superspreading events, as well as the extent of asymptomatic and pre-symptomatic transmission. In this article, let us tell you how airborne transmission is different from droplet transmission and what you can do to stay safe from respiratory infections such as COVID-19.

What you can do to prevent contracting respiratory infections?

In the current scenario,

• it’s always best to wear a mask while venturing out in crowded areas to keep respiratory infections away.


• Try to keep at least 3 feet physical distance and wash hands frequently with soap and water for at least 20 seconds.


• Do not touch your face unnecessarily.


• Practice respiratory etiquette.


• Avoid crowded places, close-contact settings and confined and enclosed spaces with poor ventilation.


• Ensure appropriate environmental cleaning and disinfection.


• To maintain immunity, opt for Indian square meal and exercises like Surya Namaskar and Pranayam or any other cardiorespiratory fitness regimen. It can help your cardio-respiratory fitness and lowers blood pressure as well. Moreover, it also increases cardio-respiratory efficiency and respiratory capacity.


• To prevent transmission, WHO recommends identifying suspect cases as quickly as possible, testing, and isolating all cases (infected people) in appropriate facilities.