Vaccination is an effective method for preventing hepatitis B, a fact widely established by numerous studies and global health organizations. However, vaccines do not offer 100% protection against infection. Vaccine effectiveness depends on various factors, including proper storage, the recipient's individual physiology, and any pre-existing medical conditions. Some individuals might not develop enough antibodies after vaccination, or their antibody levels may decline over time. Consequently, vaccinated individuals still face a risk of hepatitis B infection if they engage in unprotected sexual activity with an infected person or share items contaminated with the virus.

You should undergo a health check-up and get your antibody levels tested. If you have sufficient protective antibodies, you do not need another vaccination. If your antibody levels are below the protective threshold, you should get a booster shot.

Practice safe sex to reduce the risk of hepatitis B and other sexually transmitted infections. *Illustration: Vecteezy*

Additionally, avoid unprotected sex, practice monogamy, and use personal grooming tools such as tweezers, razors, and nail clippers exclusively to prevent infection. You should also avoid alcohol and stimulants, adopt healthy eating habits, and exercise regularly.

Hepatitis B is an infectious disease primarily transmitted through blood, from mother to child, and via unprotected sexual contact. The disease often progresses silently, showing no typical symptoms in its early stages, which means many people are unaware they are infected.

Therefore, everyone should get vaccinated to prevent the disease. Currently, Vietnam offers two types of hepatitis B vaccines, including combination vaccines that also protect against hepatitis A, suitable for both children and adults. Adults require three doses within 6 months, a hepatitis B test before vaccination, and booster shots when antibody levels decline. Children should receive the hepatitis B vaccine within 24 hours of birth, followed by scheduled vaccinations containing a hepatitis B component, such as the 5-in-1 or 6-in-1 vaccines.

Dr. CKI Nguyen Tien Dao

Medical Manager, VNVC Vaccination System

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