Mild anemia, i.e., hemoglobin > 90 g/L, can be given the New Coronavirus vaccine. If hemoglobin is < 90 g/L, it means that the anemia is more severe and the New Coronavirus vaccine is not recommended. New Coronavirus vaccine is divided into inactivated vaccine, recombinant protein vaccine and adenovirus vector vaccine, all three of which can prevent the infection of new coronavirus. Therefore, it is usually recommended to administer the vaccine after the anemia has been regulated. 1. Reduce the effect of the vaccine: When the anemia is severe, the body's hematopoietic and immune systems become more burdened, and the antibodies produced in the body may be reduced if the vaccine is administered at this time. This will affect the preventive effect of the vaccine. 2. Aggravating adverse reactions: Some adverse reactions may occur after vaccination with the new crown vaccine, such as redness, swelling, pain and itching at the vaccination site. Severe anemia may aggravate the symptoms of adverse reactions to the vaccine because of the weakness of the patient. 3. Misdiagnosis: Severe anemia may cause persistent dizziness, weakness, headache, palpitations, etc., while allergic reactions such as fever, weakness, nausea, headache, etc. may occur after vaccination with New Crown vaccine, which are similar in performance. Vaccinated patients with either mild or severe anemia should go to the hospital in time to improve routine blood tests and undergo active treatment. Daily, you can eat some foods that assist in blood supplementation such as red dates, cinnamon, spinach, etc., while following medical advice on medication. In case of nutritional anemia, attention should be paid to the supplementation of iron, folic acid, vitamin B12 and other nutrients. For patients with severe anemia, if the degree of anemia is reduced through systematic treatment and the hemoglobin is >90g/L, vaccination with New Crown vaccine can also be performed. After vaccination, the patient should be kept under observation for 30 minutes, during which time the vaccinator should pay attention to observe any serious adverse reactions, and if the symptoms are serious, the patient should promptly report to medical personnel for emergency treatment.