On April 12, Shandong Province informed a resident to dig wild vegetables outdoors. At the same time, 1 asymptomatic infected people stayed here. Neither of them was wearing a mask at that time. The household was infected, and it was judged by analysis that it was caused by aerosol transmission.
? "This is the wind that I blew through you and turned into intimate contact. I followed your path and became the receiver of Ami. So, don't walk around, it's not necessarily who blew the wind. This picture explains what aerosol propagation is.
Aerosol is an ultra-small particle suspended in the air for a long time, which belongs to the carrier and has adsorption. The settling time of one micron particles in the air reaches 1 hour, and Pm2.5 is one of them.
The solute of aerosol propagation is droplets, which are large in volume and will fall to the ground at a distance of 1- 1.8 meters. The droplet core is much smaller and lighter than the droplet and can fly with the wind. The risk of transmission still exists beyond 1- 1.8 meters.
Daily breathing, coughing, talking, vomiting, defecation (when flushing), etc. , will produce aerosol. Medical inspectors also produce aerosols when they come into contact with patients' blood, urine, feces and other samples.
How to protect aerosol as a new mode of transmission in daily life?
Aerosol infection is not as easy as imagined, nor is it "airborne" that many people mistakenly think. Aerosols mainly exist in confined spaces, and special attention should be paid to them in unventilated confined spaces. Such as elevators, airplanes, cinemas and other places with poor air mobility.
During the epidemic, all social activities should be cancelled and confined spaces should be avoided as far as possible. You must wear a mask when taking the elevator.
Always open the window. Ventilation, keep indoor air circulation.
Do a good job in household disinfection, and regularly wipe the door handles, tables and chairs, toilet seats and other important parts. Use 75% ethanol or disinfectant.
Pay attention to personal hygiene and wash your hands before and after meals. When sneezing or coughing, cover your nose and mouth with a tissue or bend your elbow.
Avoid contact with body secretions of people with suspicious symptoms, don't share meals with personal necessities and chopsticks, don't get too close to people, and keep a certain distance. Try to avoid shaking hands and hugging.
At present, the epidemic situation is grim. Wearing a mask correctly is the best protective measure to deal with the spread of droplets, which is enough to protect the public from infection.
Although aerosol spreads farther than droplets, its concentration is much lower, so its pathogenicity is greatly reduced. As long as everyone insists on wearing masks, ventilation, washing hands, etc. Take preventive measures correctly, and they can take preventive measures.