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Volume 28, Number 2—February 2022
Research

Comparative Effectiveness of Coronavirus Vaccine in Preventing Breakthrough Infections among Vaccinated Persons Infected with Delta and Alpha Variants

Irina Kislaya1Comments to Author , Eduardo Freire Rodrigues1, Vítor Borges, João P. Gomes, Carlos Sousa, José P. Almeida, André Peralta-Santos, Baltazar Nunes, and PT-COVID-19 Group2
Author affiliations: Instituto Nacional de Saúde Doutor Ricardo Jorge, Lisbon, Portugal (I. Kislaya, V. Borges, J.P. Gomes, B. Nunes); Direção-Geral da Saúde, Lisbon (E.F. Rodrigues, A. Peralta-Santos); Unilabs, Porto, Portugal (C. Sousa, J.P. Almeida)

Main Article

Figure

Distribution of Ct paired mean (reverse-transcription PCR Ct values for nucleocapsid and open reading frame 1ab genes) by coronavirus variant and vaccination status, Portugal, epidemiologic weeks 20–26 (May 17–July 4), 2021. A) Delta variant; B) Alpha variant. Box top and bottom indicate first and the third quartiles of Ct distribution, horizontal line inside box indicates median, and whiskers indicate minimum and maximum values. Ct, cycle threshold.

Figure. Distribution of Ct paired mean (reverse-transcription PCR Ct values for nucleocapsid and open reading frame 1ab genes) by coronavirus variant and vaccination status, Portugal, epidemiologic weeks 20–26 (May 17–July 4), 2021. A) Delta variant; B) Alpha variant. Box top and bottom indicate first and the third quartiles of Ct distribution, horizontal line inside box indicates median, and whiskers indicate minimum and maximum values. Ct, cycle threshold.

Main Article

1These first authors contributed equally to this article.

2Members of the PT-Covid-19 Group are listed at the end of this article.

Page created: November 29, 2021
Page updated: January 22, 2022
Page reviewed: January 22, 2022
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