PMID- 20875487 OWN - NLM STAT- MEDLINE DCOM- 20110215 LR - 20191210 IS - 1873-2518 (Electronic) IS - 0264-410X (Linking) VI - 28 IP - 50 DP - 2010 Nov 23 TI - The safety of immunizing with tetanus-diphtheria-acellular pertussis vaccine (Tdap) less than 2 years following previous tetanus vaccination: Experience during a mass vaccination campaign of healthcare personnel during a respiratory illness outbreak. PG - 8001-7 LID - 10.1016/j.vaccine.2010.09.034 [doi] AB - BACKGROUND: Tdap is recommended for health care personnel (HCP) aged <65 years who received tetanus diphtheria or tetanus toxoid immunization (Td/TT) >/=2 years earlier. During a medical center Tdap vaccination campaign, we assessed the safety of use of a Td/TT to Tdap interval <2 years in HCP. We also describe reactogenicity in HCP who were aged >/=65 years or pregnant. METHODS: HCP vaccinated with Tdap were surveyed to assess time since last Td/TT (>/=2 years vs. <2 years), age, pregnancy status, and injection site adverse events (AEs) during the 2 weeks after Tdap. AE rates were calculated and compared by non-inferiority analysis using a predetermined margin of 10%. We searched clinic logbooks to assess for clinically important adverse events during the 2 months after Tdap. RESULTS: Of the 4524 vaccinated HCP, 2221 (49.1%) completed a safety survey which met criteria for analysis. Non-inferiority analysis found that rates of moderate and/or severe injection site AEs were not significantly greater in those vaccinated <2 years than in those vaccinated >/=2 years after previous Td/TT. Three serious adverse events were reported during the 2 months after vaccination, none in persons who were >/=65 years, pregnant or received Td/TT <2 years before. CONCLUSIONS: Our findings add to the body of evidence that a short interval between Td/TT and a single dose of Tdap is safe. CI - Copyright (c) 2010 Elsevier Ltd. All rights reserved. FAU - Talbot, Elizabeth A AU - Talbot EA AD - Dartmouth Medical School, Hanover, NH, USA. elizabeth.talbot@dartmouth.edu FAU - Brown, Kristin H AU - Brown KH FAU - Kirkland, Kathryn B AU - Kirkland KB FAU - Baughman, Andrew L AU - Baughman AL FAU - Halperin, Scott A AU - Halperin SA FAU - Broder, Karen R AU - Broder KR LA - eng PT - Evaluation Study PT - Journal Article DEP - 20100925 PL - Netherlands TA - Vaccine JT - Vaccine JID - 8406899 RN - 0 (Diphtheria-Tetanus Vaccine) RN - 0 (Diphtheria-Tetanus-acellular Pertussis Vaccines) RN - 0 (Tetanus Toxoid) SB - IM MH - Adolescent MH - Adult MH - Aged MH - Diphtheria-Tetanus Vaccine/administration & dosage MH - Diphtheria-Tetanus-acellular Pertussis Vaccines/administration & dosage/*adverse effects MH - Disease Outbreaks/*prevention & control MH - Female MH - Health Personnel/*statistics & numerical data MH - Health Surveys MH - Humans MH - *Immunization Schedule MH - Male MH - *Mass Vaccination MH - Middle Aged MH - Pregnancy MH - Tetanus Toxoid/administration & dosage MH - Time Factors MH - Whooping Cough/prevention & control MH - Young Adult EDAT- 2010/09/30 06:00 MHDA- 2011/02/16 06:00 CRDT- 2010/09/30 06:00 PHST- 2010/04/12 00:00 [received] PHST- 2010/08/24 00:00 [revised] PHST- 2010/09/10 00:00 [accepted] PHST- 2010/09/30 06:00 [entrez] PHST- 2010/09/30 06:00 [pubmed] PHST- 2011/02/16 06:00 [medline] AID - S0264-410X(10)01344-7 [pii] AID - 10.1016/j.vaccine.2010.09.034 [doi] PST - ppublish SO - Vaccine. 2010 Nov 23;28(50):8001-7. doi: 10.1016/j.vaccine.2010.09.034. Epub 2010 Sep 25.