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著者: Melissa A Rolfes, Brendan Flannery, Jessie R Chung, Alissa O'Halloran, Shikha Garg, Edward A Belongia, Manjusha Gaglani, Richard K Zimmerman, Michael L Jackson, Arnold S Monto, Nisha B Alden, Evan Anderson, Nancy M Bennett, Laurie Billing, Seth Eckel, Pam Daily Kirley, Ruth Lynfield, Maya L Monroe, Melanie Spencer, Nancy Spina, H Keipp Talbot, Ann Thomas, Salina M Torres, Kimberly Yousey-Hindes, James A Singleton, Manish Patel, Carrie Reed, Alicia M Fry, US Influenza Vaccine Effectiveness (Flu VE) Network, the Influenza Hospitalization Surveillance Network, and the Assessment Branch, Immunization Services Division, Centers for Disease Control and Prevention
雑誌名: Clin Infect Dis. 2019 Nov 13;69(11):1845-1853. doi: 10.1093/cid/ciz075.
Abstract/Text
BACKGROUND: The severity of the 2017-2018 influenza season in the United States was high, with influenza A(H3N2) viruses predominating. Here, we report influenza vaccine effectiveness (VE) and estimate the number of vaccine-prevented influenza-associated illnesses, medical visits, hospitalizations, and deaths for the 2017-2018 influenza season.
METHODS: We used national age-specific estimates of 2017-2018 influenza vaccine coverage and disease burden. We estimated VE against medically attended reverse-transcription polymerase chain reaction-confirmed influenza virus infection in the ambulatory setting using a test-negative design. We used a compartmental model to estimate numbers of influenza-associated outcomes prevented by vaccination.
RESULTS: The VE against outpatient, medically attended, laboratory-confirmed influenza was 38% (95% confidence interval [CI], 31%-43%), including 22% (95% CI, 12%-31%) against influenza A(H3N2), 62% (95% CI, 50%-71%) against influenza A(H1N1)pdm09, and 50% (95% CI, 41%-57%) against influenza B. We estimated that influenza vaccination prevented 7.1 million (95% CrI, 5.4 million-9.3 million) illnesses, 3.7 million (95% CrI, 2.8 million-4.9 million) medical visits, 109 000 (95% CrI, 39 000-231 000) hospitalizations, and 8000 (95% credible interval [CrI], 1100-21 000) deaths. Vaccination prevented 10% of expected hospitalizations overall and 41% among young children (6 months-4 years).
CONCLUSIONS: Despite 38% VE, influenza vaccination reduced a substantial burden of influenza-associated illness, medical visits, hospitalizations, and deaths in the United States during the 2017-2018 season. Our results demonstrate the benefit of current influenza vaccination and the need for improved vaccines.
Published by Oxford University Press for the Infectious Diseases Society of America 2019.
PMID 30715278 Clin Infect Dis. 2019 Nov 13;69(11):1845-1853. doi: 10.1093/cid/ciz075.
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