Improving immunity and resistance can be done by improving diet, increasing exercise, injecting immunoglobulin, vaccinating, and so on. You can improve your diet and exercise first. If you need medication (immunoglobulin), you need to take it under the guidance of your doctor to avoid unnecessary damage. 1. Improve diet: Eat some nutritious food in daily life, such as milk, eggs, lean meat, etc., which can help to enhance the immunity and resistance of the body. 2. Increase exercise: Regular physical exercise and more outdoor exercise time can help improve the body’s immunity and resistance. 3. Immunoglobulin injection: this is the fastest and most effective way to enhance immunity. 4. Vaccination: The inactivated components of vaccines will stimulate the body to produce immunity and resistance against specific pathogens. If you have low immunity, you should consult a doctor in time.