Hepatitis B vaccine is the second vaccine.

The injection time of hepatitis B vaccine is stipulated. The second injection is generally made one month after the first injection is completed. At the latest, it cannot exceed this time period for one week, so as not to affect the formation of antibodies in the body. It is best to complete the injection within the specified time. After all three injections are completed, you can go to the hospital for a period of time to check the five items of hepatitis B.