Generally speaking, people with weak resistance are more susceptible to viral infections than those with strong resistance, but it is not absolute. With the improvement of people’s living standards, economic modernization and development, all kinds of environmental pollution is also more and more serious, coupled with personal bad habits such as staying up late for a long time, stress overwork, do not love sports, irregular diet, etc., will make the human body’s resistance to become weaker. People with weak resistance are often susceptible to infections such as bacteria and viruses. Because when the body’s immune system can not play a normal protective role, it will be easy to fatigue, repeated colds, wounds easily infected and other phenomena, the consumption of human body functions also intensified. So that people are often in nutritional deficiencies, mental depression, sleep disorders and other adverse conditions, over time will threaten their health, and even induce some major diseases. People with weak resistance can enhance their own resistance through a good diet, sleep quality and appropriate exercise, so that it is not easy to be infected with the virus.