Academician Zhou Qi said: Three conditions for aerosol transmission! What are the three conditions?

Previous news reports have suggested that the possible transmission routes of COVID-19 include aerosol transmission. Today, Zhou Qi, an academician of the Chinese Academy of Sciences, said that there are three conditions for aerosol transmission. What are they? What should we pay attention to? Let’s follow Feng Chao from Dongguan to find out more!

Academician Zhou Qi said: Three conditions for aerosol transmission! What are the three conditions?

1. Three conditions for aerosol transmission! What are the three conditions?

1. Confined space;

2. Exposure to high concentrations of viruses for a long time;

3. There is a possibility of aerosol transmission.

2. What should we pay attention to?

The workplace should be ventilated and people should maintain an appropriate distance.

3. Aerosol transmission

To understand what aerosol transmission is, we must first understand what "aerosol" is.

Aerosol refers to all solid and liquid particles (0.001 to 100 microns in diameter) suspended in a gas (such as air). Broadly speaking, aerosol is a type of colloid. The particle diameter of aerosol is between 0.001~100μm. Its liquid particles are called mist, and particles smaller than 1μm are called dust. In nature, the particles in the air on which human beings depend for survival are everywhere, forming a vast "aerosol world".

Aerosols can be divided into floating dust and settling dust according to their size. Dust (particle size greater than or equal to 10μm) can settle quickly under the action of its own gravity. Floating dust can float in the atmosphere for a long time, so it has the greatest impact on human health. Since dust particles with a size less than 10 microns can be easily inhaled and absorbed by the human body, they are also called inhalable particulate matter IPM (Inhalable Particulate Matter).