Not catching a cold for a long time is normal and indicates that the body is healthy with a normal immune function and robust defensive capabilities. In contrast, patients who frequently catch colds and fever generally have low immunity, showing signs of a weak constitution. Such individuals should drink more water and exercise more often. There is no need to worry or take any intervention measures if you do not catch a cold for a long period. Maintain a regular routine, adjust your mindset, avoid exposure to irritating chemicals, keep a positive attitude, avoid staying up late, and have regular health check-ups.