The WHO had described this form of transmission as rare and possibly insignificant.
This week, 239 researchers wrote an open letter to the World Health Organization, urging officials to accept the possibility that aerosols were an important contributor to the spread of the virus.
Why it matters: Hundreds of scientists around the world have called on the WHO, which informs public health policy around the world, to acknowledge that particles containing the virus can float indoors and remain infectious, per the New York Times.
The WHO also highlighted a strong possibility of transmission of virus by asymptomatic patients though evidence so far show that people with symptoms or developing symptoms to have primarily transmitted the disease.
Experts are of the opinion that though both the revisions made in the breif were long overdue, but they were not as extensive as they had hoped.
Exclusively a really small variety of ailments are believed to be unfold by way of aerosols, or tiny floating particles.
Still, officials also pointed out that other modes of transmission - like contaminated surfaces or close contacts between people in such indoor environments - might also have explained the disease's spread.
Yurianto said virus transmission through microdroplets is likely to occur in a poorly ventilated room since the SARS-CoV-2 can sustain longer in the air. Allegranzi also noted the possibility of airborne transmission in public can not be ruled out, especially in a closed, crowded, and poorly-ventilated environment.
These recommendations are "what is needed to help slow transmission in communities", Marr said. "However, the evidence needs to be gathered and interpreted".
There are many, many examples from around the world, said WHO chief.
The possibility that COVID-19 transmission could potentially be airborne highlights the need for the use of protective face masks. Even in the new guidance, it's clear that members of the committee interpreted the evidence differently, said Dr. Trish Greenhalgh, a professor of primary health care at the University of Oxford. "The push-pull of that committee is palpable".
The report once again vindicates the fact that tracing the origin of the virus is a complex scientific issue, and it is up to scientists around the world to conduct global scientific research and cooperation, Zhao said.
The worst hit country, the USA, is approaching the grim milestone of nearly one in every hundred people infected with Covid-19.
She said more research into the issue is warranted.
However, scientists are somehow disappointed of the briefpublished by the WHO.