Of which: 84% were immune–either through vaccination (n = 3,565) or past, resolved infection (n = 888); 214 (4%) people were HBV non-immune, meaning a HBsAg, Anti-HBc and Anti-HBs are all negative (and with no evidence of vaccination)–a hepatitis B vaccination care plan was added for these people; 9% (n = 489) of the population had insufficient data to determine a HBV status–HBV testing recalls were added to the primary care EHR so the individual could be offered an HBV test and appropriate action taken when results available. The gene discussed is KRT88P; the disease is infection.