PMID- 37766118 OWN - NLM STAT- PubMed-not-MEDLINE LR - 20230930 IS - 2076-393X (Print) IS - 2076-393X (Electronic) IS - 2076-393X (Linking) VI - 11 IP - 9 DP - 2023 Aug 31 TI - Safety of Interchanging the Live Attenuated MAV/06 Strain and OKA Strain Varicella Vaccines in Children. LID - 10.3390/vaccines11091442 [doi] LID - 1442 AB - Two live attenuated varicella vaccine (VZV) strains have been mainly used across the globe: MAV/06 and OKA strains. We aimed to explore the safety of interchanging the two VZV strains for primary and booster immunizations. South Korea's vaccine adverse event reporting system (VAERS) was accessed and searched to find filed reports of all adverse events (AEs) following immunization with the second dose of the varicella vaccine. The electronic medical records were reviewed for all visits to the hospital following the second dose of the varicella vaccine. Of the total 406 study participants, 27.5% (n = 112) were in the MAV/06-MAV/06 group, 30.3% (n = 123) in the MAV/06-OKA, 17.5% (n = 71) in the OKA-MAV/06 group, and 24.6% (n = 100) in the OKA-OKA group. Mean age at immunization with the first dose was 1.10 (standard deviation [SD] +/-0.34) years old, and second dose was 4.77 (SD +/- 1.13) (p = 0.772 and 0.933, respectively). There were no filed reports of AEs following the second dose in the national VAERS. Hospital visit records showed a total of 10.3% (95% confidence interval [CI], 7.6-13.7) (n = 42) had recorded AEs following the 2nd administered dose; however, only 0.7% (95% CI, 0.2-2.4) (n = 3) were regarded as possibly vaccine related. Two patients in the MAV/06-OKA group were diagnosed with Henoch-Schonlein purpura after the second dose; however, both had also received the MMR vaccine on the same day. No safety signals associated with interchanging the MAV/06 and OKA strain live attenuated varicella vaccines were observed in this patient cohort of healthy children. FAU - Kang, Hyun Mi AU - Kang HM AUID- ORCID: 0000-0003-0513-8407 AD - Department of Pediatrics, Seoul St. Mary's Hospital, College of Medicine, The Catholic University of Korea, Seoul 06591, Republic of Korea. FAU - Kim, Gwanglok AU - Kim G AD - Department of Corporate Development, GC Biopharma Corporation, Yongin 16924, Republic of Korea. FAU - Choe, Young June AU - Choe YJ AD - Department of Pediatrics, Korea University College of Medicine, Korea University Anam Hospital, Seoul 02841, Republic of Korea. LA - eng PT - Journal Article DEP - 20230831 PL - Switzerland TA - Vaccines (Basel) JT - Vaccines JID - 101629355 PMC - PMC10536300 OTO - NOTNLM OT - MAV/06 OT - OKA OT - safety OT - vaccine OT - varicella COIS- The authors declare no conflict of interest. The funders had no role in the collection, analyses, interpretation of data, and writing of the manuscript. EDAT- 2023/09/28 06:42 MHDA- 2023/09/28 06:43 PMCR- 2023/08/31 CRDT- 2023/09/28 01:44 PHST- 2023/07/28 00:00 [received] PHST- 2023/08/25 00:00 [revised] PHST- 2023/08/30 00:00 [accepted] PHST- 2023/09/28 06:43 [medline] PHST- 2023/09/28 06:42 [pubmed] PHST- 2023/09/28 01:44 [entrez] PHST- 2023/08/31 00:00 [pmc-release] AID - vaccines11091442 [pii] AID - vaccines-11-01442 [pii] AID - 10.3390/vaccines11091442 [doi] PST - epublish SO - Vaccines (Basel). 2023 Aug 31;11(9):1442. doi: 10.3390/vaccines11091442.