Pertussis seroprevalence in different age groups in Greece
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Updated: Jul 16, 2026

COVID-19 Seroprevalence Test for IgG Antibody Levels Among Healthy Donors Across Different Pandemic Phases in Jeddah
Published on: June 24, 2025
Ioanna D Pavlopoulou1, Vassiliki Syriopoulou, George L Daikos
1First Department of Paediatrics, Athens University, Athens, Greece. idpavlop@yahoo.gr
Abstract:
In order to target the appropriate age population for booster vaccination, we examined the antibody titres against pertussis toxin (PT) in different age groups in immunized and non-immunized individuals. In the immunized population, the highest anti-PT levels were observed in the 0- to 2-y age group and the lowest in the teenager and young adult groups. In contrast, in the control group, anti-PT levels were minimal in infants and young children, increasing in adolescence and early adulthood, and waning after 30 y of age. Antibody levels >30 U/ml were observed with higher frequency in children <2 y of age, in individuals with complete vaccination history and in non-immunized individuals. These findings may have important implications in optimizing vaccination policies.
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