Can the second needle of darling second liver vaccine be postponed hit

The second dose of hepatitis B vaccine can be postponed for 1~2 days. If the delay is too long, there is no effect of preventing hepatitis B. We also need to go to the hospital for the third dose of vaccine 6 months after the first dose. Suggestion: Family members can go to the hospital for blood tests when the baby is vaccinated for the third dose to determine whether there is hepatitis B antibody in the body.