The Journal of infectious diseases · 2023
Residual Humoral Immunity Sustained Over Decades in a Cohort of Vaccinia-Vaccinated Individuals.
Клинический случайСтатьяПоддержка исследования: вне правительства СШАНазвание и аннотация: Перевод в очереди
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Chan Conrad E Z, Wong Steven K K, Yazid Nurhidayah Binte M, Ng Oon Tek, Marimuthu Kalisvar, Chan Monica, Howe Hwee Siew, Leo Yee-Sin, Leung Bernard P, Vasoo Shawn S, Young Barnaby E
Аннотация
Serological testing of Singaporeans who received childhood smallpox vaccination found anti-vaccinia IgG binding and neutralizing activity indicating long-term humoral immunity. There was correlation between IgG and neutralizing titers indicating IgG could be used as a surrogate marker for humoral immunity. In 2019, Singapore experienced a case of imported monkeypox. As with smallpox, disease can be prevented through vaccination, which was mandatory for Singaporean infants until 1981. However, the degree of residual immunity in older vaccinated Singaporeans remains unknown. Sera from individuals born 1946-1984 were therefore tested and those born prior to 1981 were found to have higher anti-vaccinia IgG and neutralizing activity titers. This suggests that protective humoral immunity remains, which could reduce disease severity in an orthopoxvirus outbreak. Correlation between IgG and neutralizing titers was observed indicating that serology could be used as a surrogate marker for immunity.