Because the human body’s constant body temperature provides reliable “housing” conditions for many pathogens, there have been many terrible infectious diseases in human history, and even the driving factors of human migration to the world. At the beginning of the founding of New China, due to the explosive growth of the population and limited sanitary conditions, which provided good conditions for the spread of infectious diseases, at that time, many of the oldest and most terrifying infectious diseases in human history began to wreak havoc, among them Including trachoma, one of the most common blinding eye diseases in humans. It is believed that the disease rate in rural areas with poor sanitary conditions at that time could reach more than 90%, and even in Shanghai with good sanitary conditions, the disease rate of trachoma reached about 50%. statement. The group most susceptible to trachoma are children. In my impression, as long as my eyes were slightly red and swollen when I was a child, my family would be terrified to think that I had trachoma. I remember at that time many people thought that trachoma could be transmitted by looking at each other, so people with red and swollen eyes would be regarded as aliens, and no one dared to look at him; more interestingly, everyone still recognized .
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