children(7) COVID-19(4) Vaccines(2) pneumococcus(2) Immunosuppression(2) Tuberculosis(2) respiratory infections(2) Conclusion: Addition of antigens to a vaccine resulted in a higher reactogenicity, but the AEs were in general mild and transient. What is Known: • Assessment of adverse events is (2) Ethylmercury(2) MIS-C(2) cerebral palsy(2) Vaccine(2) Influenza(2) Conclusion: Delayed vaccination during the primary vaccination schedule occurs in one sixth of the Dutch children. Efforts to improve compliance should be focused in particular on (2) Developmental outcomes(2) immunization status(2) Google Trends(1) Pseudo-allergic reaction(1) Adolescent(1) infection rate(1) COVID-19 genetic susceptibility(1) Salmonella(1) diagnostic score(1) invasive bacterial disease(1) Autoimmune disease(1) Biomarkers(1) antimicrobial resistance(1) Recurrent otitis media(1) Forceps birth(1) SARS-CoV-2(1)