The diseases that cannot be vaccinated may vary depending on the type of vaccine. Vaccination is to prevent diseases by injecting vaccine preparations that are non-pathogenic and immunogenic to the human body to induce an immune response. If in a serious disease state may not be suitable for vaccination in the near future, not only limited to seven diseases, mainly including the following diseases: 1. febrile diseases: such as pneumonia, lung abscess, acute appendicitis, etc. may cause systemic febrile symptoms and poor body condition, which may affect antibody production after vaccination, thus affecting the vaccine effect; 2. neurological diseases: such as Green-Barre syndrome, epilepsy neurological diseases, vaccination is not recommended when good control is not obtained to avoid serious adverse reactions; 3. severe chronic diseases: such as severe hyperglycemia, coronary heart disease, liver cirrhosis and other severe chronic diseases are not recommended to be vaccinated before they are effectively controlled to avoid serious adverse reactions and endanger health; 4. acute infectious diseases: such as epidemic hemorrhagic fever, active tuberculosis, typhus and other acute Patients with infectious diseases such as epidemic hemorrhagic fever, active tuberculosis, typhus and other acute infectious diseases have poor resistance, which affects the immunization effect of vaccines and is detrimental to health; 5. reaction, aggravating the disease and affecting health. In addition, vaccination is not recommended for people with severe malnutrition, allergies to vaccine components, pregnant women and nursing mothers. Vaccination is contraindicated in acute diseases, acute attacks of serious chronic diseases and fever, and it is generally recommended that the vaccine be administered at least 2 weeks after the symptoms have subsided. The above contraindications apply to a variety of vaccination situations, so you can ask your doctor before vaccination to avoid adverse consequences of vaccination due to your own illness.