| アブストラクト | OBJECTIVES: To estimate the proportion of live-attenuated influenza vaccine (LAIV) doses administered beyond expiry date in children and adolescents during influenza seasons 2013-2014 and 2014-2015 in the UK. DESIGN: This was a retrospective cohort study. Two cohorts of children and adolescents who received LAIV from 1 September 2013 to 31 March 2014 and from 1 September 2014 to 31 March 2015 and aged 2-17 years at time of LAIV administration were identified from the Clinical Practice Research Datalink (CPRD). SETTING: More than 500 primary care practices in the UK. POPULATION: Proportions of vaccine doses administered beyond expiry date were assessed among 47 396 and 67 099 LAIV recipients with a documented vaccine lot identifier in influenza seasons 2013-2014 and 2014-2015, respectively. INTERVENTION: None. MAIN OUTCOME MEASURE: Administrations of expired LAIV were ascertained by comparison of vaccination dates in CPRD records with expiration dates in AstraZeneca/MedImmune lot distribution data. RESULTS: Overall, 245 LAIV recipients, 80 in 2013-2014 and 165 in 2014-2015, received a dose after its expiration date, yielding proportion estimates of 1.7 per 1000 doses (95% CI 1.3 to 2.1) in season 2013-2014 and 2.5 per 1000 (95% CI 2.1 to 2.8) in season 2014-2015. This proportion increased above 1.0% after December during each season. Most (84% in influenza season 2013-2014 and 59% in influenza season 2014-2015) received an expired dose <30 days after its expiration date. The proportion was higher in London (relative risk 1.93 (95% CI 1.25 to 2.99)) and when the number of LAIV recipients registered in the practice was lower than the median number per practice (relative risk 2.69 (95% CI 1.99 to 3.62)). CONCLUSIONS: Administration of expired LAIV doses occurs infrequently. |
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| ジャーナル名 | BMJ open |
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| Pubmed追加日 | 2017/7/19 |
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| 投稿者 | Caspard, Herve; Wise, Robert P; Steffey, Amy; Brody, Robert S |
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| 組織名 | MedImmune, Gaithersburg, Maryland, USA.;Former employee of AstraZeneca, Gaithersburg, Maryland, USA.;AstraZeneca, Gaithersburg, Maryland, USA. |
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| Pubmed リンク | https://www.ncbi.nlm.nih.gov/pubmed/28716794/ |
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