PMID- 21957494 OWN - NLM STAT- MEDLINE DCOM- 20120321 LR - 20151119 IS - 1554-8619 (Electronic) IS - 1554-8600 (Linking) VI - 7 IP - 10 DP - 2011 Oct TI - Two doses of pandemic influenza A(H1N1) vaccine: tolerability in healthy young children in the Netherlands. PG - 1048-54 LID - 10.4161/hv.7.10.16692 [doi] AB - During the 2009 influenza pandemic, children aged 6 months up to and including 4 years, without chronic illness, were vaccinated with two doses of Pandemrix((R)) through mass vaccination in the Netherlands. During the vaccination campaign a warning was issued about fever after the second dose of Pandemrix((R)). Therefore, we investigated the tolerability of both doses Pandemrix((R)) in these children. Among parents of children eligible for vaccination, 1500 questionnaires were distributed during both, the first and second mass vaccination session. We asked for the occurrence, time interval, and duration of local reactions and systemic adverse events (AEs). The responses were 36.7% and 29.5% after each dose, respectively. Local reactions were reported in 40.4% and 39.3%, most frequently, pain at the injection site. After the first and second dose, 29.6% and 30.7% of all children experienced fever (mean temperature 38.8degree signC). Other systemic AEs were reported in 41.6% and 42.9% of the children. No differences were seen between the first and second dose for all reported AEs except for pallor. One child was hospitalized after the first dose, but a causal relation to the vaccination was considered improbable. In conclusion, fever was frequently reported in children 6 months up to and including 4 years of age after the first and second dose of Pandemrix((R)). However, for almost all AEs, including fever, no dose effect was observed. Reported AEs were mostly mild and all were transient. FAU - van't Klooster, Tessa M AU - van't Klooster TM AD - Department of Epidemiology and Surveillance, Centre for Infectious Disease Control, National Institute for Public Health and the Environment, Bilthoven, The Netherlands. FAU - Kemmeren, Jeanet M AU - Kemmeren JM FAU - de Melker, Hester E AU - de Melker HE FAU - Vermeer-de Bondt, Patricia E AU - Vermeer-de Bondt PE FAU - van der Maas, Nicoline A T AU - van der Maas NA LA - eng PT - Journal Article DEP - 20111001 PL - United States TA - Hum Vaccin JT - Human vaccines JID - 101265291 RN - 0 (Influenza Vaccines) RN - 0 (pandemrix) SB - IM MH - Child, Preschool MH - Drug-Related Side Effects and Adverse Reactions/epidemiology MH - Female MH - Humans MH - Immunization, Secondary/*adverse effects/*methods MH - Infant MH - Influenza A Virus, H1N1 Subtype/immunology MH - Influenza Vaccines/administration & dosage/*adverse effects/*immunology MH - Influenza, Human/immunology/*prevention & control MH - Male MH - Netherlands MH - Surveys and Questionnaires MH - Vaccination/*adverse effects/*methods EDAT- 2011/10/01 06:00 MHDA- 2012/03/22 06:00 CRDT- 2011/09/30 06:00 PHST- 2011/09/30 06:00 [entrez] PHST- 2011/10/01 06:00 [pubmed] PHST- 2012/03/22 06:00 [medline] AID - 16692 [pii] AID - 10.4161/hv.7.10.16692 [doi] PST - ppublish SO - Hum Vaccin. 2011 Oct;7(10):1048-54. doi: 10.4161/hv.7.10.16692. Epub 2011 Oct 1.