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Serious AEFIs (hospitalization and all-cause deaths) incidence rates (per 100,000 person-days with exact 95% CI) by calendar months. Incidence per 100,000 person-days (with exact 95% CI); *Calendar month with 30-days period, irrespective of study year period; Person-time starts from the first day of the month and until the last day of the month period or until the Serious AEFI events (hospitalization/death).
