The third dose of the New Crown vaccine costs nothing. The New Crown vaccine is a free national vaccine, and the full three doses are free. The third dose of the new crown vaccine is an inactivated or recombinant subunit vaccine, which is an effective means of preventing new coronavirus infections. The new coronavirus vaccine advocates voluntary vaccination, and is recommended for people over three years of age and those without contraindications. The new vaccine is free of charge for the whole population. At present, universal vaccination is very important for the prevention and control of the new coronavirus pneumonia epidemic, and it is everyone’s responsibility and obligation, so I hope that everyone will respond positively to the vaccination. However, people with fever, pregnant women, and patients who are allergic to vaccine components are contraindicated to receive the vaccine, and people who have received other vaccines for less than 14 days are also contraindicated to receive the vaccine. After vaccination, antibodies will be produced, which can effectively reduce the risk of contracting C.N.C.P., and even after contracting C.N.C.P., the incidence of severe pneumonia can be reduced. Tip: In this article, “new coronary pneumonia and new coronary virus pneumonia” were renamed to “new coronary virus infection” on December 26, 2022, as announced by the National Health Commission.