It is possible to receive the first vaccine without having received the first dose. Vaccines with more than one dose include the new coronary vaccine and hepatitis B vaccine. In order to prevent neocoronavirus pneumonia, you need to actively vaccinate with neocoronavirus vaccine, which can be given at the local vaccination station. In order to prevent Hepatitis B, you need to actively vaccinate with Hepatitis B vaccine, which can also be given at the local vaccination station, and this vaccine is an effective measure to prevent certain infectious diseases. Vaccination may produce adverse reactions such as rash, itching, fever, headache, fatigue, difficulty in breathing, palpitations (rapid heartbeat, often accompanied by panic), and people with allergies should be cautious about vaccination. People who have not been vaccinated need to receive the first vaccination under the guidance of a physician’s visit to prevent the occurrence of infectious diseases and avoid adverse reactions. Tip: “New coronavirus pneumonia” and “new coronavirus pneumonia” mentioned in this article were renamed to “new coronavirus infection” on December 26, 2022, as announced by the National Health Commission.