It is not possible to generalize whether erythrocytosis can be vaccinated with the New Crown vaccine, but it is not possible if the disease is in an acute exacerbation. Erythrocytosis is categorized into relative and absolute, and absolute is categorized into primary and secondary, which need to be determined according to the specific disease. 1. Relative erythrocytosis is seen in severe vomiting, diarrhea, extensive burns and other diseases, if the disease is in the acute stage, does not meet the requirements of the new crown vaccination, can be postponed. 2. Absolute erythrocytosis is divided into primary and secondary. Primary erythrocytosis is caused by gene mutation, if the condition is stable, you can receive the vaccine, but patients who are taking interferon therapy or in the exacerbation phase of the disease are not recommended to receive the vaccine. However, it is not recommended for patients who are taking interferon therapy or in the exacerbation phase of their disease. ② Secondary diseases are mostly seen in certain diseases, such as kidney cancer, ovarian cancer, etc., and it is necessary to decide whether or not to vaccinate according to the actual condition of the patient. Whether a patient can be vaccinated or not also needs to consider the patient’s own condition, the severity of the disease and other factors, so it is recommended that the patient go to a regular hospital department for consultation and consultation, to be determined by a professional physician after a comprehensive assessment, and not to be vaccinated blindly.