Health

A new study finds that Covid loses almost all its ability to transmit after short distances

A new study revealed that the new Corona virus loses 90 percent of its ability to infect people within 20 minutes of being transmitted by air.

The Center for Aerosol Research at the University of Bristol says it has conducted a study, the first of its kind, that sheds light on how the Corona virus behaves once it is transmitted in the air during the exhalation process, although the study has not yet been subject to peer review.

“People focus on poorly ventilated spaces and think about air moving across meters or across the room. I’m not saying this hasn’t happened, but I think still the biggest risk of exposure is when you are close to someone,” said Jonathan Reed, director of the think tank. Watchman, which first published about the study on Tuesday.

“When you move away, not only are the aerosols diluted, but there is a virus that is less contagious because the virus has lost its infectivity. [as a result of time],” he added.

The study suggested that when virus particles leave the lungs during exhalation, they lose water rapidly.

Then a rapid increase in pH occurs when the molecules move to lower levels of carbon dioxide.

These two factors hinder its ability to infect another person, but the speed with which virus particles dry depends on the humidity of the surrounding air, according to the study.

The study showed that when humidity drops below 50 percent, the virus loses about half of the infection within five seconds.

At a humidity level of 90 percent, virus infection decreases more slowly, with 52 percent of particles still infectious after five minutes.

However, the study said that the air temperature had no effect on the infection of the virus.

He noted that the airworthiness data is in line with the view that the virus has primarily spread over short distances.

The study said that the assumption was that transmission over short distances was caused by large droplets falling to the ground more quickly and thus not traveling long distances.

“The rapid loss of infection shown in these measurements provides an alternative explanation for short transmission distance, with the rapid airborne losses of viral infection making transmission decreasingly likely with increasing distance from the particle source, even if the virus-containing particles are small and able to travel long distances. ‘, explained the study.

She added that this loss of infection was compounded by the “significant dilution in the aerosol concentration produced after exhalation and transmission beyond the short term.”

“That means if I meet friends for lunch at a bar today, elementary school [risk] I’m more likely to send it to my friends or friends who send it to me, rather than someone on the other side of the room.” Professor Reed explained.

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