New Crown’s second and third shots are separated by more than four weeks if it is a three-dose dose, and more than six months if it is a two-dose dose. If the vaccinee is vaccinated with a three-dose vaccine, such as recombinant subunit vaccine, the second and third shots are generally separated by more than four weeks, while the third shot should be given within six months after the first shot, otherwise the immunization effect will be affected. For two-dose vaccines, such as inactivated vaccines, the third shot is a booster shot, and the third shot should usually be given six months after the second shot. For some special groups of people, such as vaccinees who have allergic reactions after receiving the second dose of vaccine and groups with acute illnesses or acute exacerbations of chronic illnesses, the timing of the third dose should be determined in consultation with the doctor. After receiving the new crown vaccine, it is still not to be taken lightly, you should pay attention to the usual protection, and immediately consult a doctor if you have any physical discomfort.