Two different vaccinations can be given half a month apart, and the same vaccination needs to be given at the prescribed intervals. Vaccination can effectively prevent the corresponding diseases. Since the body needs to induce an immune response after vaccination to produce the corresponding antibodies to achieve the effect of disease prevention, it usually takes a certain period of time to receive the next vaccination. For different types of vaccines, in order to avoid aggravating the adverse reactions, another vaccine can be given after a half-month interval. For the same kind of vaccine, it should be injected according to the specified time, for example, Hepatitis B vaccine is usually injected at zero month, one month and half a year respectively. For the current inactivated vaccine, it is also recommended to complete the inactivated vaccine at 0 month, 1 month and 6 months, and the booster shot at 0 month, 1 month and 6 months. You can also consult the doctor at the vaccination center for the exact intervals.