A person infected with coronavirus can pass it on just by talking to someone in a closed environment such as a tube train or small office, simulations reveal. In a simulation of Tube travel, produced by software firm MSC, one infected person can be seen literally coating other passengers with COVID-19 - just by talking. Researchers found that someone chatting to a friend on the tube can'coat others' with the deadly coronavirus - even if they don't sneeze or cough. The new model looking at ways droplets from breath spread in enclosed spaces comes as Britain prepares to return to work, school and a level of normality after lockdown. Public transport has become busier as people return to work and children prepare to return to school.
Fox News Flash top headlines are here. Check out what's clicking on Foxnews.com. Face shields and masks with exhalation valves were found to be less effective at protecting others from the coronavirus than normal face coverings, according to a study on Tuesday. New research, published in the journal Physics of Fluids, determined that the two options, which some wearers find more comfortable -- allowed ejected particles to escape, putting those around you in danger of being exposed to the virus. The findings come amid an increasing trend of people replacing their regular cloth or surgical masks with clear plastic face shields, or masks equipped with exhalation valves.
Wearing a cloth face mask while exercising leads to worse performance, according to the results of a small trial. It found that when donning a face covering, a person's exercise duration drops by 14 per cent while participants also recorded increased feelings of breathlessness and claustrophobia when exercising at higher intensities. The results of the trial on 31 healthy adults have been published online in the British Journal of Sports Medicine (BJSM). Thirty of the participants said that the task -- running on a treadmill to exhaustion -- was harder when wearing a face covering. World Health Organization (WHO) guidance backs up the finding, stating: 'People should NOT wear masks when exercising, as masks may reduce the ability to breathe comfortably'.
It likely provides protection for both. Studies on the new coronavirus and other germs show wearing a mask helps stop infected people from spreading disease to others. Evidence also suggests that masks may offer some protection for the people wearing them. Surgical or cloth face masks can block most of those particles from spreading. While some droplets may still spread out, wearing a mask could reduce the amount, providing a benefit to others.
For anyone who grows anxious at the sound of a sneeze or a cough these days, Lydia Bourouiba's research offers little comfort. Bourouiba, a fluid dynamics scientist at MIT, has spent the last few years using high-speed cameras and light to reveal how expulsions from the human body can spread pathogens, such as the novel coronavirus. When the sternutation is over, a turbulent cloud of droplet-containing gas can remain suspended for several minutes, depending on the size of the droplet. Understanding exactly how these clouds travel and disperse is critical to containing infectious respiratory diseases such as COVID-19. Many knowledge gaps remain over how it spreads.