The fourth injection of the new coronavirus pneumonia vaccine is the fourth injection of the new coronavirus pneumonia vaccine. At present, the vaccination of the fourth injection is not popular in China, so the conditions of vaccination are not yet clear. As far as domestic vaccines are concerned, the main vaccine is the recombinant protein-based vaccine, which requires three injections in total, with a one-month interval between the first and second injections, and a six-month interval between the third booster injection and the second injection, and can be administered without any obvious uncomfortable symptoms. Apart from the recombinant protein-based vaccine, there is also the adenovirus vector vaccine which requires only one injection and the inactivated vaccine which requires two injections. Whether a fourth vaccination injection will be introduced subsequently is still at the research stage. For the new coronavirus pneumonia, prevention is still the mainstay of daily life. Wear masks when going out, ventilate the room, wash your hands frequently, avoid gathering of people, and take active steps to get vaccinated. If fever, cough and other symptoms need to immediately go to the hospital fever clinic for screening. [Tip] This article refers to “new coronary pneumonia, new coronary virus pneumonia”, etc., has been December 26, 2022, the National Health Commission issued a notice to change the name to “new coronary virus infection”.