The aim of this project was to study waning immunity after primary COVID-19 vaccine regimens as well as booster vaccinations. The study complemented common test-negative case-control studies, using real world data pulled from other VAC4EU studies, highlighting the advantages of readiness. These data sources represent five countries across Southern, Central, and Eastern Europe, and an estimated 67 million patients.
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COVID-19 Vaccines Effectiveness
The primary objective of this study was to estimate the effectiveness and waning of effectiveness in adults and adolescents (heterologous vs homologous primary vaccinations), children...
