Comparative Effectiveness of COVID-19 Vaccines in Preventing Infections and Disease Progression from SARS-CoV-2 Omicron BA.5 and BA.2, Portugal
Irina Kislaya
1
, Pedro Casaca
1, Vítor Borges, Carlos Sousa, Bibiana I. Ferreira, Ana Fonte, Eugénia Fernandes, Carlos Matias Dias, Sílvia Duarte, José Pedro Almeida, Inês Grenho, Luís Coelho, Rita Ferreira, Patrícia Pita Ferreira, Cláudia Medeiros Borges, Joana Isidro, Miguel Pinto, Luís Menezes, Daniel Sobral, Alexandra Nunes, Daniela Santos, António Maia Gonçalves, Luís Vieira, João Paulo Gomes, Pedro Pinto Leite, Baltazar Nunes, Ausenda Machado
2, and André Peralta-Santos
2
Author affiliations: Instituto Nacional de Saúde Doutor Ricardo Jorge, Lisbon, Portugal (I. Kislaya, V. Borges, C. Matias Dias, S. Duarte, L. Coelho, R. Ferreira, J. Isidro, M. Pinto, D. Sobral, A. Nunes, D. Santos, L. Vieira, J.P. Gomes, B. Nunes, A. Machado); Comprehensive Health Research Centre, Lisbon (I. Kislaya, C. Matias Dias, B. Nunes, A. Machado, A. Peralta-Santos); Direção-Geral da Saúde, Lisbon (P. Casaca, E. Fernandes, P. Pita Ferreira, P. Pinto Leite, A. Peralta-Santos); Unilabs, Porto, Portugal (C. Sousa, J.P. Almeida, L. Menezes, A. Maia Gonçalves); Algarve Biomedical Center Research Institute, Faro, Portugal (B.I. Ferreira, I. Grenho); Administração Central do Sistema de Saúde, Lisbon (A. Fonte, C.M. Borges)
Main Article
Table 3
Adjusted odds ratios of hospitalization among COVID-19 case-patients, by SARS-CoV-2 variant, Portugal, 2022*
Vaccination status |
BA.5
|
|
BA.2
|
aOR BA.5/BA.2 (95% CI) |
No. (%) |
aOR (95% CI) |
No. (%) |
aOR (95% CI) |
Not vaccinated |
9/590 (1.53) |
Referent |
|
14/631 (2.2) |
Referent |
|
Complete primary vaccination |
9/2,530 (0.36) |
0.78 (0.29–2.09) |
|
11/2,434 (0.45) |
0.38 (0.16–0.89) |
2.06 (0.56–7.55) |
1st booster vaccination |
34/9,186 (0.37) |
0.23 (0.10–0.51) |
|
29/12,331 (0.24) |
0.07 (0.03–0.14) |
3.36 (1.18–9.63) |
Main Article
Page created: December 31, 2022
Page updated: February 19, 2023
Page reviewed: February 19, 2023
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