为什么清洁过度也有害?众所周知,人不可能生活在真空、无菌的空间里,环境“不洁”是个客观事实。所幸,人的机体里还存在一个能够与之抗衡的免疫系统。一旦病菌、过敏性物质进入人体,免疫系统便会产生出具有特异性功能的免疫球蛋白(又叫抗体),专门来对付这种抗原。依靠这支免疫大军,机体就可以随时对付“入侵之敌”,保证自身的安全。免疫系统产生抗体是被动的。一个人有机会经常接触适量的微生物,并非绝对是坏事。因为,这样可以让免疫系统“经受锻炼”,制造出相应的抗体来。于是,以后即使遇到大量 Why is it too harmful? It is well known that one can not live in a vacuum, a sterile space, and the “uncleanness” of the environment is an objective fact. Fortunately, there is an immune system in the human body that can compete with it. Once germs, allergic substances into the body, the immune system will produce a specific function of immunoglobulin (also known as antibodies), specifically to deal with this antigen. Rely on this immune army, the body can always deal with “enemy of invasion” to ensure their own safety. The immune system produces antibodies that are passive. It is not absolutely bad for a person to have regular access to the right amount of microbes. Because, this can make the immune system “to exercise” to create the corresponding antibodies. So, even after a large number encountered