I had two doses of the combination hepatitis A and B vaccine (TWINRIX®) and missed my third dose at six months. Do I have to restart the schedule?

Question: 
I had two doses of the combination hepatitis A and B vaccine (TWINRIX®) and missed my third dose at six months. Do I have to restart the schedule?
 
 
Answer: 
No, you do not have to restart the vaccine schedule because:
  • For many vaccines, a longer interval between vaccine doses results in higher antibody levels after the series has been completed.
  • For most vaccines, antibody levels decline gradually over time. Even months or years later, another vaccine dose can boost antibodies to higher levels.
The combination hepatitis A and B vaccine (TWINRIX®) routine adult schedule provides full protection once you receive all three doses. Please speak to your immunization provider to complete your vaccine series.
Date last reviewed: 
Friday, Apr 29, 2022