A novel coronavirus can be suspended for more than 10 minutes in the enclosed space, a new study shows, which highlights the importance of voice transmission in the dissemination of new coronaviruses.
A team of researchers at the National Institute of diabetes, digestive and kidney disease (NIDDK) asked people to repeat the phrase “stay healthy” loudly in a closed box for 25 seconds, AFP reported. The laser that is projected into the box illuminates the droplets so that they can be seen and counted.
The study is published in the latest issue of the proceedings of the National Academy of Sciences (PNAs). Studies have shown that saliva droplets produced by speech stay in the air for an average of 12 minutes.
Given the known concentration of the new coronavirus in saliva, scientists estimate that speaking loudly every minute can produce more than 1000 droplets containing the virus, which can stay in a closed space for 8 minutes or more.
“This direct visualization shows how normal speech produces droplets in the air that can be suspended for a few minutes or longer and are very capable of spreading the virus in a limited space,” the researchers concluded
In another study, published in the New England Journal of medicine in April, the team found that the smaller the voice, the less droplets it produced.
If the infectivity level of the new coronavirus can be confirmed by voice, it can scientifically promote many countries to recommend people to wear masks and help explain the rapid spread of the virus.
Recently, Guangzhou Yuexiu Elderly Service Center launched a “dog doctor” visit activity. A group of special “visitors” – Four “dog doctors” had a close interaction with the elderly. The lively and lovely dog doctors were very popular with the elderly, and there were endless laughter and warm atmosphere.
It is understood that “dog doctor” is an innovative animal adjuvant treatment project of Asia animal fund. In 2004, the project was officially launched in China. At present, more than 100 “dog doctors” in Chengdu, Guangzhou and Shenzhen regularly carry out visiting activities.
commentary the reporter saw that the 10-year-old “dog doctor” was lying in the arms of the old man. Since 2014, he has participated in the “dog doctor” project and won the title of “senior dog doctor” in 2016. So far, he has been on duty for 51 times. Miss Zhang, the owner of Zizai, told reporters that Zizai is gentle and likes to be held and close to others.
synch Miss Zhang, the owner of dog doctor
When I was at a low ebb, I adopted a baby, and then it really stayed with me all the time, releasing a lot of that pressure, easing my tension and uneasiness, thus greatly reducing my loneliness and frustration. Then I occasionally learned from my friends that the Asia animal foundation has a dog doctor program. I didn’t hesitate to sign up for it. I wanted it to bring more people that kind of happiness and spiritual comfort.
commentary Miss Xu, the owner of “dog doctor” Cooper, said that the “dog doctor” activity has a positive educational effect, especially in kindergarten and primary school. Children can not only understand the correct way to communicate with dogs, but also build up the morality of caring for animals.
synch Miss Xu, the owner of “doctor dog”
Because I think dogs bring us unconditional love all their lives, and if I have the chance to take them to participate in these activities, in fact, I think, let me and them, that is, the days with their company, will have more beautiful memories.