In many people's cognition, they may think that viruses are not good things. Because we all know the virus, it often causes some damage to our bodies, leading to some diseases and even serious diseases, and may even lead to human death. From these aspects, it is true that the virus is a very evil thing, and most people may not want to catch any virus themselves.
But we should know that everything in this world has two sides, both advantages and disadvantages. If the virus is not toxic enough to do us too much harm, then it will exercise our immune system. It can stimulate our immune system and make it stronger, so as to better cope with some future risks. In other words, it can give us a stronger defense shield, so from this point of view, the virus still has certain benefits.
Of course, I say this on the premise that the virus will not cause serious harm to our human body. If it will cause serious harm, then it is naturally not desirable.
To sum up, we need to know that the virus is harmful to our human body in many cases, but it is beneficial to our human body in a few cases.
The above is my answer to this question. I don't know if you have any other views on this issue, or if you have some different views. Welcome to discuss this problem with me below.