Moderate influenza vaccine effectiveness against A(H1N1)pdm09 virus, and low effectiveness against A(H3N2) subtype, 2018/19 season in Italy

被引:19
作者
Bellino, Stefania [1 ]
Bella, Antonino [1 ]
Puzelli, Simona [1 ]
Di Martino, Angela [1 ]
Facchini, Marzia [1 ]
Punzo, Ornella [1 ]
Pezzotti, Patrizio [1 ]
Castrucci, Maria Rita [1 ]
Di Mario, Giuseppina [2 ]
Calzoletti, Laura [2 ]
Fabiani, Concetta [2 ]
Chironna, Maria [3 ]
Germinario, Cinzia [4 ]
Tramuto, Fabio [5 ]
Di Carlo, Vittorio
Affanni, Paola [6 ]
Pascucci, Maria Grazia [7 ]
D'Agaro, Pierlanfranco [8 ]
Gallo, Tolinda [9 ]
Pagani, Elisabetta [10 ]
Natter, Bernhard [11 ]
Camilloni, Barbara [12 ]
Tosti, Anna [13 ]
Pariani, Elena [14 ]
Senatore, Sabrina [15 ]
Serra, Caterina [16 ]
Tanchis, Pierina Rita [17 ]
Ghisetti, Valeria [18 ]
Tiberti, Donatella [19 ]
Romano, Lucio [20 ]
Volpe, Enrico [21 ]
Giannecchini, Simone [22 ]
机构
[1] Natl Inst Hlth, Ist Super Sanita, Dept Infect Dis, Rome, Italy
[2] ISS, Dept Infect Dis, Rome, Italy
[3] Hosp Univ Bari, Mol Epidemiol & Publ Hlth Lab, Bari, Italy
[4] Univ Bari, Dept Biomed Sci & Human Oncol, Hyg Sect, Bari, Italy
[5] Univ Palermo, Dept Hlth Promot Sci & Mother Child Care G DAless, Palermo, Italy
[6] Univ Parma, Dept Med & Surg, Parma, Italy
[7] Reg Hlth Author, Bologna, Italy
[8] Univ Trieste, Dept Med Surg & Hlth Sci, Trieste, Italy
[9] Integrated Hlth Unit, Prevent Infect Dis Vaccinat & Travel Med, Udine, Italy
[10] Alto Adige Hlth Unit, Microbiol & Virol Lab, Bolzano, Italy
[11] Prevent Hlth Promot & Publ Hlth Off, Bolzano, Autonomous Prov, Italy
[12] Univ Perugia, Dept Med, Microbiol Unit, Perugia, Italy
[13] Reg Directorate Hlth & Welf, Perugia, Italy
[14] Univ Milan, Dept Biomed Sci Hlth, Milan, Italy
[15] Gen Welf Directorate, Milan, Italy
[16] Univ Sassari, Dept Biomed Sci, Sassari, Italy
[17] Hyg & Hlth Promot, Cagliari, Italy
[18] Amedeo Savoia Hosp, Lab Microbiol & Virol, Turin, Italy
[19] Reg Reference Serv Epidemiol Prevent Surveillance, Alessandria, Italy
[20] Univ Cattolica Sacro Cuore, A Gemelli Univ Polyclin Fdn, Dept Lab Sci & Infect Dis, Rome, Italy
[21] Reg Directorate Integrated Hlth & Social Serv, Rome, Italy
[22] Univ Florence, Dept Expt & Clin Med, Florence, Italy
关键词
Influenza vaccine effectiveness; test-negative case-control study; national influenza surveillance network; Italy; MORTALITY; EFFICACY;
D O I
10.1080/14760584.2019.1688151
中图分类号
R392 [医学免疫学]; Q939.91 [免疫学];
学科分类号
100102 ;
摘要
Background: Influenza vaccines are updated every year to match the vaccine strains with currently circulating viruses; consequently influenza vaccine effectiveness (IVE) has to be assessed annually. Research design and methods: A test-negative case-control study was conducted within the context of the Italian sentinel influenza surveillance network to estimate IVE by age group, virus subtype, and vaccine brand in medically attended laboratory-confirmed influenza. Results: In Italy, the 2018/19 influenza season was characterized by the co-circulation of influenza A(H1N1)pdm09 and A(H3N2) viruses. The adjusted IVE estimate in preventing influenza was moderate (44.8%, 95% CI: 18.8 to 62.5) against A(H1N1)pdm09, whereas there was no evidence of effectiveness (1.8%, 95% CI: -37.8 to 30.1) in persons affected by A(H3N2). IVE against A(H1N1)pdm09 decreased with age ranging from 65.7% to 13.1% among children/adolescents and elderly, respectively; moreover results suggest that Vaxigrip Tetra (R) was more effective against A(H1N1)pdm09 compared to Fluarix Tetra (R) [62.5% (95% CI: 34.3 to 78.6) vs 24.5% (95% CI: -40.6 to 59.6)]. Low effectiveness (35.2%, 95% CI: -50.8 to 72.1) against A(H3N2) was detected only in the elderly immunized with Fluad (R). Conclusions: Findings suggest that influenza vaccines were low to moderately effective, probably due to a mismatch between circulating and vaccine strains.
引用
收藏
页码:1201 / 1209
页数:9
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