Hepatitis B vaccine requires that the 2nd dose be given ≥28 days after the 1st dose, and does not have to be given 30 days apart.
Generally, it is required that the 2nd vaccination be given ≥28 days after the 1st vaccination, and the interval between the 2nd and 3rd vaccination of hepatitis B vaccine should be ≥60 days, so there is no requirement that the 2nd vaccination of hepatitis B vaccine has to be given on 30 days.
About the interval time of hepatitis B vaccine can only be used as a reference, the specific vaccination time should be combined with their own situation, if there is any abnormal reaction or other discomfort, it is necessary to postpone the time of vaccination, and the patient will not choose to re-vaccinate because of the extension of the vaccination time.
If you need to be vaccinated with hepatitis B vaccine, you should know your own condition first. For those who have fever, pyrexia and other adverse reactions, you need to postpone the vaccination time and wait until your body has fully recovered before you are vaccinated. If there is any discomfort or other adverse reaction after vaccination, it is recommended to consult the doctor in time.