Talking emits tiny particles of mucus or saliva that travel through the air. What experts don’t know is whether these particles can carry the coronavirus — or how much someone would need to inhale to get sick.
When researcher Josh Santarpia stands at the foot of a bed, taking measurements with a device that can detect tiny, invisible particles of mucus or saliva that come out of someone's mouth and move through the air, he can tell whether the bedridden person is speaking or not just by looking at the read-out on his instrument.
They want to know that with a high degree of confidence because the question of whether or not the coronavirus can be"airborne" is extremely contentious right now — and it's a question that has real implications for what people should do to avoid getting infected.
"I think the public is concerned about this, but the World Health Organization says 'no, the disease is not airborne,'" says Marr. An"airborne" virus, in contrast, has long been considered to be a virus that spreads in exhaled particles that are tiny enough to linger in the air and move with air currents, letting them be breathed in by passersby who then get sick. Measles is a good example of this kind of virus — an exhaled measles pathogen can hang suspended in a room for a couple hours after an infected person leaves.
What's more, coughs and sneezes create turbulent clouds of gas that can propel respiratory particles forward. Fauci went on to say he was"disturbed" by headlines about the virus traveling such distances"because that's misleading. That means that, all of a sudden, the 6-foot thing doesn't work." needed for health-care workers when they do medical procedures which might be anticipated to produce smaller respiratory droplets that could then be inhaled.
It may have been artificial, says Marr, but"the conditions they used in that laboratory study are actually less favorable for survival compared to the real world. So it's more likely that the virus can survive under real world conditions." He thinks it is possible that some form of airborne spread is playing a role in the transmission of this virus.
France Dernières Nouvelles, France Actualités
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