Tiny droplets containing the new coronavirus help the virus spread easily to others,media BGR reported. We knew this a few months ago, and that’s why it’s so important to wash your hands frequently, keep your social distance, and use protective items like masks. If these droplets fall on people’s eyes, mouths or noses, they may become infected. Droplets sprayed after sneezing or coughing land back on the surface, which in turn causes infection. But there is growing evidence that just talking is enough to spread the virus, and a new study provides more evidence.
Over the past few weeks, we’ve seen experiments that support the same idea. Larger droplets can travel up to 6 feet in the air and land on surfaces — and air conditioners take them 6 feet away from what is considered safe. But tiny droplets produced when people speak can stay in the air for longer, especially in poorly ventilated rooms. And these aerosols may be enough to infect infected people with COVID-19 to others.
Researchers from the National Institutes of Health (NIH) Institute of Diabetes, Digestive and Kidney Diseases (NIDDK) and the University of Pennsylvania used lasers and cameras to record the droplets and assess their behavior in the air. They found that speaking loudly produces large amounts of droplets per second that hover in the air for a few minutes.
Highly sensitive laser light scattering observations have found that loud speakers can spew out thousands of droplets every second. In closed, stagnant air environments, they disappear from the window, and the time constant is in 8 to 14 minutes, equivalent to droplet nuclei (droplet nuclei) about 4 m in diameter, or droplets of 12 to 21 m before dehydration.
The study acknowledges that cameras can’t capture every tiny droplet that a person spews as they speak, and the researchers explain that the amount of the virus in saliva may vary from person to person. On average, speaking for a minute produces at least 1,000 droplet nuclei that contain the virus, which stay in the air for more than eight minutes, the researchers said. But some people may pop up to 100,000 virus nuclei for every minute they speak loudly. Many of these tiny particles are small and reach the lower respiratory tract when inhaled by others.
This study and the similar work we’ve seen, it’s not certain that speaking out will spew enough viruses to infect others. But it provides sufficient evidence to support the idea that the spread of COVID-19 is possible through speech. The study will also explain how asymptomatic patients can spread the disease without sneezing or coughing.
The researchers who were not involved in the study agreed. “This study is the most accurate measurement of the size, number, and frequency of droplets left in the mouth during a normal conversation, and may affect any audience in the range,” Benjamin Neuma, a virologist at Texas Agricultural University’s Teksacana, told The Washington Post.
He continued, “This study does not directly test whether the virus can be transmitted through conversation, but it establishes a powerful situation where droplets produced in normal close conversations will be large enough and frequent enough to create a high-risk spread of SARS-CoV-2 or any other respiratory virus between people who do not wear masks.” “
The study has been peer-reviewed and can be found in the Proceedings of the National Academy of Sciences. Videos can be downloaded at this link.