Abstract
A seroprevalence study of hepatitis A virus (HAV), hepatitis B virus (HBV), and varicella-zoster virus (VZV) was carried out among Saudi Arabian National Guard soldiers with the objective of determining the cost-saving potential of prevaccination antibody tests when implementing an immunization program for the soldiers. A systematic sampling of 450 blood samples from 1,350 soldiers who donated blood at our hospital was carried out. Antibody tests were performed using the enzyme-linked immunosorbent assay method. The seropositivity rates for antibodies to HAV, HBV, and VZV were 97.5, 17.8, and 88.5%, respectively. Comparing the cost of prevaccine screening with that of universal vaccination, it was estimated that savings of 76 and 32% could be effected for HAV and VZV. Conversely, screening for HBV before immunization could increase the cost of vaccinating against the disease by 49%. A seroprevalence study could be a useful cost-saving approach to a mass immunization program against endemic, natural immunity-conferring diseases.
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