240 experts urge WHO, CDC to acknowledge airborne transmission of COVID-19

240 experts urge WHO, CDC to acknowledge airborne transmission of COVID-19

Microdroplets of infectious coronavirus could be airborne for hours and current social distancing practices may not be enough to stop infection and spread, experts argue.

In an open letter to appeal to the international science community, nearly 240 health experts urge their colleagues to take airborne transmission seriously as COVID-19 cases continue to rise in the most parts of the United States.

While most of the heavier respiratory droplets don’t reach more than six feet from a person, aerosolized droplets can span across an entire room, according to the letter, and hang in the air for several hours.

“There is significant potential for inhalation exposure to viruses in microscopic respiratory droplets (microdroplets) at short to medium distances (up to several meters, or room scale), and we are advocating for the use of preventive measures to mitigate this route of airborne transmission,” experts wrote.

The World Health Organization doesn’t recognize aerosolized transmission except in healthcare settings through “aerosol-generating procedures.” The Centers for Disease Control and Prevention have said “airborne transmission from person-to-person over long distances is unlikely.”

The open letter argues airborne transmission could be the only plausible explanation behind super spreader events where social distancing protocols were followed to prevent respiratory droplet transmission, as chronicled in an early Chinese study.

In other studies, researchers have found viral RNA in these microdroplets but were unable to prove that they can infect a healthy person. Dr. Matthew Heinz, hospitalist at Tucson Medical Center in Arizona, says there’s plenty of anecdotal evidence to suggest airborne transmissible is possible.

“I think that it is true that we don’t have a complete picture in terms of evidence as whether they’re confirmed to be infectious,” he said. “But on the front lines… it seems (airborne transmission) is happening based on who I’m admitting and their described behavior.”

If airborne transmission plays a big role in spread, the country may have to rethink many of its prevention methods. Heinz said this could include increasing social distancing from six feet to 15 or 20 feet, changing air flow management and canceling inside activities.

“Even crowded together outside in an open-air situation is still a problem,” Heinz said. “We really need to be more cautious upfront.”

Dr. Frank Esper, a physician at the Cleveland Clinic Children’s Center for Pediatric Infectious Diseases, believes it’s not only impractical to impose such stringent measures but also unnecessary as current social distancing practices have already proven to reduce transmission.

While he doesn’t doubt airborne microdroplets may contribute to spread, he believes respiratory droplets are still the main mode of transmission.

“Am I surprised that aerosolization is one component of the virus spread? No,” he said. “Obviously we want transmission to be zero, but we still really need to focus on what are the major modes of spread from to person to person and place to place.”

The WHO and CDC need more evidence to definitively declare airborne transmission as a major driver of spread before rewriting recommendations and Esper said there are studies in progress that seek to answer that question. However, he argues these public health agencies also need to soften their stance on aerosolized transmission.

A Florida milestone:State surpasses 200,000 COVID-19 cases

'N95 mask and hand sanitizer at the ready':The COVID-19 pandemic affects the future of Gen Z travel

In the open letter, scientists recommend taking the following measures to mitigate airborne transmission risk:

Provide sufficient and effective ventilation by supplying clean outdoor air and minimizing recirculating air in public buildings, office, schools, hospitals and nursing homes.Supplement general ventilation with airborne infection controls such as local exhaust, high efficiency air filtration and germicidal ultraviolet lights.Avoid overcrowding, particularly in public transport and buildings.

"No one is saying this is playing the entire role, but what the scientists are trying to say is that we need to pay more attention in preparation for resurging cases that we expect to occur int he months to come," Esper said.

Health and patient safety coverage at USA TODAY is made possible in part by a grant from the Masimo Foundation for Ethics, Innovation and Competition in Healthcare. The Masimo Foundation does not provide editorial input.

Follow Adrianna Rodriguez on Twitter: @AdriannaUSAT.

Source: https://www.usatoday.com/story/news/health/2020/07/06/covid-19-coronavirus-spreads-airborne-transmission-experts-say/5383598002/

News Related


Trump’s ‘mission accomplished’ moment is premature and deadly. We have not defeated COVID.

Desperate for crowds and adoration, Trump has put his most fervent supporters at risk of getting a deadly disease. Future historians will be astonished. Read more »

NFLPA president JC Tretter says NFL is putting season, players at risk with its coronavirus approach

NFL Players Association president JC Tretter said Tuesday the NFL is putting the 2020 season at risk with its coronavirus approach, calling on the league to better “prioritize player safety.” “Like many other... Read more »

Brazilian President Jair Bolsonaro says he tested positive for the coronavirus

RIO DE JANEIRO (AP) — Brazil’s President Jair Bolsonaro says he has tested positive for COVID-19 after months of downplaying the virus’ severity. Bolsonaro confirmed the test results while wearing a mask and... Read more »

Venice Film Festival forges ahead amid COVID-19 pandemic with reduced lineup

The show will go on for the Venice Film Festival in September, but with a few modifications due to the COVID-19 pandemic. Organizers said Tuesday that they are pushing forward with plans for... Read more »

Amtrak offers buy-one, get-one promotion on its sleeper trains amid COVID-19 — with a catch

Amtrak wants you to have sweet dreams the next time you travel — so much so that it’s sweetening the deal on its sleeper “roomettes.” The rail service is offering a buy-one-get-one-free discount... Read more »

Florida teen treated with hydroxychloroquine at home before dying of COVID-19, report says

FORT MEYERS, Fla. – The family of a 17-year-old Florida girl who died last month from COVID-19 treated her symptoms at home for nearly a week before taking her to a hospital, a... Read more »

Mookie Betts worried MLB coronavirus testing woes could prevent him from ever playing for Dodgers

During nearly four months away from the game, Mookie Betts said he “stayed away from baseball to keep myself sane.” It’s not hard to understand why. The 2018 American League Most Valuable Player... Read more »

Tom Hanks doesn’t get ‘how common sense has somehow been put into question’ with coronavirus

Read more »

Can Gov. DeSantis force Florida schools to reopen amid the coronavirus pandemic? Some school leaders seem doubtful.

PALM BEACH, Fla. — As concern about the state order spread online, some school leaders said: Not so fast. As Florida educators puzzle over how to start the new academic year, Gov. Ron... Read more »

Texas surpasses 200,000 coronavirus cases after 4th of July holiday weekend

AUSTIN, Texas – Texas reached 200,000 total COVID-19 cases Monday, just 17 days after crossing the 100,000 threshold, a figure that took the state nearly four months to hit. The grim milestone came... Read more »