Hepatitis B Vaccination, Immunity & Screening Frequency Calculator

Important: Please read the Preliminary Status questions (1 & 2) and the first 3 Baseline Risk Factor (Category A) questions carefully.

Baseline Risk Factors (Category A)

Check any that apply to determine if a baseline test is needed.

Are you an adult (18 years or older) who has NEVER had the full Hepatitis B screening panel (HBsAg, anti-HBs, anti-HBc) before, OR are you unsure of your infection/immunity status?

Were you born in a country or region where Hepatitis B infection prevalence is 2% or more, or lived there for more than 6 months?

Search Countries with HBsAg prevalence ≥ 2%:

Regardless of where you were born, were you NOT vaccinated against Hepatitis B AS AN INFANT, AND were either of your parents born in a region with high Hepatitis B prevalence (≥8%)?

Search Countries with HBsAg prevalence ≥ 8%:

Have you been told you have elevated liver enzymes (e.g., ALT or AST)?

Have you ever been incarcerated in a jail, prison, or other detention setting? Note: A history of incarceration typically warrants baseline testing plus a follow-up test ~6 months after release to cover the incubation period. Ongoing periodic testing (Category B or higher) is generally only needed if high-risk behaviours associated with incarceration are continuing post-release, or if other separate risk factors are present. This needs assessment by a healthcare provider.

Have you previously lived with someone known to have Hepatitis B? Note: This typically warrants baseline testing plus a follow-up test ~6 months after moving out to cover the incubation period. Ongoing testing is usually not needed unless other risk factors are present.

Have you had multiple high-risk sexual partners in the past, especially without consistent condom use, or involving non-vaccinated partners, or involving partners from high HBV prevalence countries, or involving partners who have HIV, or involving exposure to menstrual blood, or involving anal sex? Note: This history typically warrants baseline testing. Ongoing periodic testing (Category C or D) is only needed if this behaviour is current and meets the partner number thresholds below. This needs assessment by a healthcare provider.

Have you been diagnosed with Hepatitis C (HCV) in the past, but have since been cured? Note: This typically warrants baseline testing around the time of cure confirmation to check for HBV co-infection acquired previously. Ongoing testing is usually only needed if the risk behaviours that led to HCV are still present.

Have you been diagnosed with a sexually transmitted infection (STI) recently (other than HIV or HCV)? Note: A recent STI diagnosis serves as a marker for recent sexual activity that could also have exposed you to HBV. A baseline HBV test is recommended. Ongoing testing depends on whether high-risk sexual behaviours are continuing - see Categories C & D.

Ongoing Risk Factors (Category B - Annual Testing)

Check any that apply IF you are susceptible (unvaccinated, non-responder, or immunity unconfirmed).

Do you currently have more than 10 new sexual partners per year, BUT practice consistent lower-risk behaviours (e.g., always use condoms, partners likely vaccinated and not from high HBV prevalence countries or known to have HIV, no anal sex, no exposure to menstrual blood)? Note: While the number of partners increases potential exposure frequency, consistent use of risk reduction strategies significantly lowers the per-encounter risk. Annual testing is suggested, but individual assessment with a provider is crucial.

Do you currently have only one sexual partner per year, but engage in high-risk practices with that partner (e.g., inconsistent condom use, partner is unvaccinated, partner is from a high HBV prevalence country, partner has HIV, exposure to menstrual blood, anal sex)? Note: Even with one partner, specific high-risk practices warrant ongoing monitoring. Annual testing is suggested, but individual assessment with a provider is crucial.

Ongoing Risk Factors (Category C - 6-Monthly Testing)

Check any that apply IF you are susceptible (unvaccinated, non-responder, or immunity unconfirmed).

Do you currently live with someone known to have Hepatitis B?

Do you currently have between 2 and 5 high-risk sexual partners per year, especially without consistent condom use, or involving non-vaccinated partners, or involving partners from high HBV prevalence countries, or involving partners who have HIV, or involving exposure to menstrual blood, or involving anal sex?

Are you a man who has sex with men (MSM), especially without consistent condom use or involving anal sex?

Do you have current, active Hepatitis C (HCV) infection?

Have you been diagnosed with Human Immunodeficiency Virus (HIV) infection? Note: HIV co-infection significantly increases risk. Six-monthly testing provides regular monitoring for susceptible individuals. Frequency might be adjusted (e.g., annually for very stable patients with no other risks, or more often if other high risks are present) based on guidance from a healthcare provider considering HIV control, HBV vaccination status/response, etc.

Do you receive ongoing dialysis (including hemodialysis or peritoneal dialysis)?

Are you currently incarcerated in a jail, prison, or other detention setting?

Ongoing Risk Factors (Category D - 3-Monthly Testing)

Check any that apply IF you are susceptible (unvaccinated, non-responder, or immunity unconfirmed).

Do you currently have more than 5 high-risk sexual partners per year, especially without consistent condom use, or involving non-vaccinated partners, or involving partners from high HBV prevalence countries, or involving partners who have HIV, or involving exposure to menstrual blood, or involving anal sex?

Do you currently inject drugs not prescribed by a doctor, OR have you injected drugs in the past and might share equipment now?

Have you recently shared needles, syringes, or other drug-preparation equipment with someone known to have Hepatitis B?

Have you recently had sexual contact, especially without condom use or involving anal sex, with someone known to have Hepatitis B?

Hepatitis B Vaccination, Immunity & Screening Frequency Calculator

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