PMID- 32621741 OWN - NLM STAT- MEDLINE DCOM- 20210610 LR - 20210610 IS - 1537-6613 (Electronic) IS - 0022-1899 (Print) IS - 0022-1899 (Linking) VI - 223 IP - 1 DP - 2021 Jan 4 TI - A Randomized Phase 4 Study of Immunogenicity and Safety After Monovalent Oral Type 2 Sabin Poliovirus Vaccine Challenge in Children Vaccinated with Inactivated Poliovirus Vaccine in Lithuania. PG - 119-127 LID - 10.1093/infdis/jiaa390 [doi] AB - BACKGROUND: Understanding immunogenicity and safety of monovalent type 2 oral poliovirus vaccine (mOPV2) in inactivated poliovirus vaccine (IPV)-immunized children is of major importance in informing global policy to control circulating vaccine-derived poliovirus outbreaks. METHODS: In this open-label, phase 4 study (NCT02582255) in 100 IPV-vaccinated Lithuanian 1-5-year-olds, we measured humoral and intestinal type 2 polio neutralizing antibodies before and 28 days after 1 or 2 mOPV2 doses given 28 days apart and measured stool viral shedding after each dose. Parents recorded solicited adverse events (AEs) for 7 days after each dose and unsolicited AEs for 6 weeks after vaccination. RESULTS: After 1 mOPV2 challenge, the type 2 seroprotection rate increased from 98% to 100%. Approximately 28 days after mOPV2 challenge 34 of 68 children (50%; 95% confidence interval, 38%-62%) were shedding virus; 9 of 37 (24%; 12%-41%) were shedding 28 days after a second challenge. Before challenge, type 2 intestinal immunity was undetectable in IPV-primed children, but 28 of 87 (32%) had intestinal neutralizing titers >/=32 after 1 mOPV2 dose. No vaccine-related serious or severe AEs were reported. CONCLUSIONS: High viral excretion after mOPV2 among exclusively IPV-vaccinated children was substantially lower after a subsequent dose, indicating induction of intestinal immunity against type 2 poliovirus. CI - (c) The Author(s) 2020. Published by Oxford University Press for the Infectious Diseases Society of America. FAU - Bandyopadhyay, Ananda S AU - Bandyopadhyay AS AD - Bill & Melinda Gates Foundation, Seattle, Washington, USA. FAU - Gast, Chris AU - Gast C AD - Biostatistical Consulting, Washington, USA. FAU - Brickley, Elizabeth B AU - Brickley EB AD - Department of Infectious Disease Epidemiology, London School of Hygiene & Tropical Medicine, London, United Kingdom. FAU - Ruttimann, Ricardo AU - Ruttimann R AD - Fighting Infectious Diseases in Emerging Countries, Miami, Florida, USA. FAU - Clemens, Ralf AU - Clemens R AD - Global Research in Infectious Diseases, Rio de Janeiro, Brazil. FAU - Oberste, M Steven AU - Oberste MS AD - Division of Viral Diseases, Centers for Disease Control and Prevention, Atlanta, Georgia, USA. FAU - Weldon, William C AU - Weldon WC AD - Division of Viral Diseases, Centers for Disease Control and Prevention, Atlanta, Georgia, USA. FAU - Ackerman, Margaret E AU - Ackerman ME AD - Thayer School of Engineering, Dartmouth College, Hanover, New Hampshire, USA. FAU - Connor, Ruth I AU - Connor RI AD - Department of Pediatrics, Geisel School of Medicine at Dartmouth, Dartmouth-Hitchcock Medical Center, Lebanon, New Hampshire, USA. FAU - Wieland-Alter, Wendy F AU - Wieland-Alter WF AD - Department of Pediatrics, Geisel School of Medicine at Dartmouth, Dartmouth-Hitchcock Medical Center, Lebanon, New Hampshire, USA. FAU - Wright, Peter AU - Wright P AD - Department of Pediatrics, Geisel School of Medicine at Dartmouth, Dartmouth-Hitchcock Medical Center, Lebanon, New Hampshire, USA. FAU - Usonis, Vytautas AU - Usonis V AD - Clinic of Children's Diseases, Institute of Clinical Medicine, Faculty of Medicine, Vilnius University, Lithuania. LA - eng SI - ClinicalTrials.gov/NCT02582255 PT - Clinical Trial, Phase IV PT - Journal Article PT - Randomized Controlled Trial PT - Research Support, Non-U.S. Gov't PL - United States TA - J Infect Dis JT - The Journal of infectious diseases JID - 0413675 RN - 0 (Antibodies, Neutralizing) RN - 0 (Poliovirus Vaccine, Inactivated) RN - 0 (Poliovirus Vaccine, Oral) SB - IM CIN - J Infect Dis. 2021 Jan 4;223(1):7-9. PMID: 32621744 MH - Antibodies, Neutralizing MH - Child, Preschool MH - Female MH - Humans MH - Immunogenicity, Vaccine MH - Infant MH - Intestines/immunology MH - Lithuania MH - Male MH - Poliomyelitis/*immunology/prevention & control MH - Poliovirus Vaccine, Inactivated/administration & dosage MH - Poliovirus Vaccine, Oral/administration & dosage/adverse effects/*immunology MH - Virus Shedding PMC - PMC7781454 OTO - NOTNLM OT - immunogenicity OT - inactivated poliovirus vaccine OT - oral poliovirus vaccine OT - poliovirus OT - vaccine OT - viral shedding EDAT- 2020/07/06 06:00 MHDA- 2021/06/11 06:00 PMCR- 2020/07/04 CRDT- 2020/07/05 06:00 PHST- 2020/04/14 00:00 [received] PHST- 2020/06/25 00:00 [accepted] PHST- 2020/07/06 06:00 [pubmed] PHST- 2021/06/11 06:00 [medline] PHST- 2020/07/05 06:00 [entrez] PHST- 2020/07/04 00:00 [pmc-release] AID - 5867494 [pii] AID - jiaa390 [pii] AID - 10.1093/infdis/jiaa390 [doi] PST - ppublish SO - J Infect Dis. 2021 Jan 4;223(1):119-127. doi: 10.1093/infdis/jiaa390.