The third vaccine needle of the New Crown vaccine has no effect on the lungs. The third vaccination, the so-called booster shot, is usually an inactivated vaccine, which can further increase the concentration of antibodies in the body, thus making the body more immune to the new coronavirus. Currently, inactivated vaccines, recombinant subunit vaccines, and adenovirus vector vaccines are the main types of vaccines used in the clinic. A large number of studies on each type of vaccine have not found that vaccination will cause any kind of lung disease, nor will it increase the probability of developing a certain kind of lung disease, and there is no damage to the lung function of the patients after receiving the vaccine, so the third injection of the NeoCrown vaccine has no effect on the lungs. Vaccination is one of the most important ways to prevent the spread and infection of the new coronavirus, and should be done as early as possible and throughout the entire course of vaccination.