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. 2022 Jun;35(5):375-380.
doi: 10.1089/vim.2021.0226. Epub 2022 May 10.

Rubella Humoral Immunity Among the Saudi Population of Madinah in the Western Region of Saudi Arabia

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Rubella Humoral Immunity Among the Saudi Population of Madinah in the Western Region of Saudi Arabia

Nadir A Ibrahim et al. Viral Immunol. 2022 Jun.

Abstract

Maintaining herd immunity against the rubella virus is important for controlling the spread and recurrence of rubella. Rubella vaccination for children has been affordable in Saudi Arabia since 1982. To assess the immune response derived from vaccination, we assessed the seroprevalence against the rubella virus among the population of the Madinah region. An indirect enzyme-linked immunosorbent assay (ELISA) was used to measure anti-rubella IgG antibodies in 791 serum samples obtained from 336 (42.5%) men and 455 (57.5%) women, ranging from 14 to 49 years in age. Among all participants, 94.2% were seropositive for rubella IgG antibodies, indicating a high degree of immunization. However, 5.8% of participants were seronegative, suggesting a population of either poor vaccine responders or the potential risk of waning vaccine-induced immunity. No significant difference or association with rubella seropositivity was identified according to age, sex, or pregnancy status. The median anti-rubella IgG antibody concentrations differed significantly between age groups (p < 0.001). Although a high percentage of the tested population in Madinah demonstrated anti-rubella IgG antibody seropositivity, a notable percentage of the population were seronegative, making them susceptible to infection.

Keywords: IgG antibody; MMR vaccine; Madinah; rubella virus; seropositivity.

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