PMID- 31051279 OWN - NLM STAT- MEDLINE DCOM- 20191024 LR - 20191024 IS - 1878-3511 (Electronic) IS - 1201-9712 (Linking) VI - 85S DP - 2019 Aug TI - MF59-adjuvanted seasonal trivalent inactivated influenza vaccine: Safety and immunogenicity in young children at risk of influenza complications. PG - S18-S25 LID - S1201-9712(19)30194-8 [pii] LID - 10.1016/j.ijid.2019.04.023 [doi] AB - OBJECTIVE: To assess the safety and immunogenicity of the MF59-adjuvanted seasonal trivalent inactivated influenza vaccine (aIIV3; Fluad) in children aged 6 months through 5 years who are at risk of influenza complications. METHODS: A retrospective analysis was performed to examine unsolicited adverse events (AEs) in an integrated dataset from six randomized clinical studies that compared aIIV3 with non-adjuvanted inactivated influenza vaccines (IIV3). The integrated safety set comprised 10 784 children, of whom 373 (3%) were at risk of influenza complications. RESULTS: The at-risk safety population comprised 373 children aged 6 months through 5 years: 179 received aIIV3 and 194 received non-adjuvanted IIV3 (128 subjects received a licensed IIV3). The most important risk factors were respiratory system illnesses (62-70%) and infectious and parasitic diseases (33-39%). During the treatment period, unsolicited AEs occurred in 54% of at-risk children and 55% of healthy children who received aIIV3; of those receiving licensed IIV3, 59% of at-risk and 62% of healthy subjects reported an unsolicited AE. The most common AEs were infections, including upper respiratory tract infection. Serious AEs (SAEs) were reported in <10% of at-risk subjects, and no vaccine-related SAEs were observed. In the immunogenicity subset (involving 103 participants from one study), geometric mean titers (GMTs) were approximately 2- to 3-fold higher with aIIV3 than with IIV3 for all three homologous strains (A/H1N1, A/H3N2, and B). Seroconversion rates were high for both aIIV3 (79-96%) and IIV3 (83-89%). CONCLUSIONS: In young children at risk of influenza complications, aIIV3 was well-tolerated and had a safety profile that was generally similar to that of non-adjuvanted IIV3. Similar to the not-at-risk population, the immune response in at-risk subjects receiving aIIV3 was increased over those receiving IIV3, suggesting aIIV3 is a valuable option in young children at risk of influenza complications. CI - Copyright (c) 2019. Published by Elsevier Ltd. FAU - Patel, Sanjay S AU - Patel SS AD - Novartis Vaccines and Diagnostics, Inc., Cambridge, MA, USA. FAU - Bizjajeva, Svetlana AU - Bizjajeva S AD - Novartis Vaccines and Diagnostics GmbH, Marburg, Germany. FAU - Heijnen, Esther AU - Heijnen E AD - Seqirus Netherlands BV, Amsterdam, The Netherlands. FAU - Oberye, Janine AU - Oberye J AD - Seqirus Netherlands BV, Amsterdam, The Netherlands. Electronic address: janine.oberye@seqirus.com. LA - eng PT - Journal Article DEP - 20190430 PL - Canada TA - Int J Infect Dis JT - International journal of infectious diseases : IJID : official publication of the International Society for Infectious Diseases JID - 9610933 RN - 0 (Adjuvants, Immunologic) RN - 0 (Influenza Vaccines) RN - 0 (MF59 oil emulsion) RN - 0 (Polysorbates) RN - 0 (Vaccines, Inactivated) RN - 7QWM220FJH (Squalene) SB - IM MH - *Adjuvants, Immunologic/adverse effects MH - Child, Preschool MH - Female MH - Humans MH - Immunogenicity, Vaccine MH - Infant MH - Influenza A Virus, H1N1 Subtype/immunology MH - Influenza A Virus, H3N2 Subtype/immunology MH - Influenza Vaccines/*adverse effects/*immunology MH - Influenza, Human/complications/prevention & control MH - Male MH - *Polysorbates/adverse effects MH - Retrospective Studies MH - Seasons MH - Seroconversion MH - *Squalene/adverse effects MH - Vaccines, Inactivated/immunology OTO - NOTNLM OT - Adjuvant OT - Children OT - Influenza OT - MF59 OT - Risk of influenza complications OT - Vaccine EDAT- 2019/05/06 06:00 MHDA- 2019/10/28 06:00 CRDT- 2019/05/04 06:00 PHST- 2019/02/16 00:00 [received] PHST- 2019/04/22 00:00 [revised] PHST- 2019/04/24 00:00 [accepted] PHST- 2019/05/06 06:00 [pubmed] PHST- 2019/10/28 06:00 [medline] PHST- 2019/05/04 06:00 [entrez] AID - S1201-9712(19)30194-8 [pii] AID - 10.1016/j.ijid.2019.04.023 [doi] PST - ppublish SO - Int J Infect Dis. 2019 Aug;85S:S18-S25. doi: 10.1016/j.ijid.2019.04.023. Epub 2019 Apr 30.