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Neutralizing antibodies induced by homologous and heterologous boosters in CoronaVac vaccines in Chile

Acevedo, Johanna; Acevedo, Mónica L.; Gaete-Argel, Aracelly; Araos, Rafael; González, Cecilia; Espinoza, Daniela; Rivas, Solange; Pizarro, Pablo; Jarpa, Stephan; Soto-Rifo, Ricardo; Jara, Alejandro; Valiente-Echeverría, Fernando (2023)

Objectives:To determine the impact of a booster dose on the humoral response in individuals inoculated with a complete schedule of any SARS-CoV-2 vaccine, we evaluated the neutralizing antibody (NAb) titres of homologous ...

Evaluation of the Immune Response Induced by CoronaVac 28-Day Schedule Vaccination in a Healthy Population Group

Escobar, Alejandro; Reyes, Felipe; Acevedo, Mónica; Alonso, Luis; Valiente, Fernando; Soto, Ricardo; Portillo, Hugo; Gatica, Jimena; Flores, Iván; Nova, Estefanía; Barrera, Carlos; Bono, María; Vargas, Leonardo; Simon, Valeska; Leiva, Elias; Vial, Cecilia; Hormazábal, Juan; Jimena, Lina; Valdés, Daniel; Sandino, Ana; Imarai, Mónica; Acuña, Claudio (2022)

CoronaVac vaccine from Sinovac Life Science is currently being used in several countries. In Chile, the effectiveness of preventing hospitalization is higher than 80% with a vaccination schedule. However, to date, there ...

Effectiveness of BNT162b2 booster after CoronaVac primary regimen in pregnant people during omicron period in Brazil

Florentino, Pilar T. V.; Alves, Flávia J. O.; Silva, Thiago Cerqueira; Oliveira, Vinicius de Araújo; Júnior, Juracy B. S.; Penna, Gerson O.; Boaventura, Viviane; Werneck, Guilherme L.; Pearce, Neil; Rodrigues, Laura C.; Barreto, Mauricio L.; Barral Netto, Manoel; Paixão, Enny S. (The Lancet Infectious Diseases, 2023)

Change in COVID-19 risk over time following vaccination with CoronaVac: a testnegative case-control study

Hitchings, Matt D. T.; Ranzani, Otavio T.; Lind, Margaret L.; Dorion, Murilo; D’Agostini, Tatiana Lang; Paula, Regiane Cardoso de; Paula, Olivia Ferreira Pereira de; Villela, Edlaine Faria de Moura; Torres, Mario Sergio Scaramuzzini; Oliveira, Silvano Barbosa de; Schulz, Wade; Almiron, Maria; Said, Rodrigo; Oliveira, Roberto Dias de; Silva, Patricia Vieira da; Araújo, Wildo Navegantes de; Gorinchteyn, Jean Carlo; Dean, Natalie E.; Andrews, Jason R.; Cummings, Derek A. T.; Ko, Albert I.; Croda, Julio (MedRxiv, 2022)

Duration of protection of CoronaVac plus heterologous BNT162b2 booster in the Omicron period in Brazil

Silva, Thiago Cerqueira; Oliveira, Vinicius de Araujo; Paixão, Enny S; Bertoldo Júnior, Juracy; Penna, Gerson O; Werneck, Guilherme L; Pearce, Neil; Barreto, Maurício L; Boaventura, Viviane S; Barral Netto, Manoel (Nature Research, 2022)

Neutralizing antibody titers elicited by CoronaVac and BNT162b2 vaccines in health care workers with and without prior SARS-CoV-2 infection

Wolff Reyes, Marcelo José; Acevedo Acevedo, Mónica Loreto; Núñez, María Antonieta; Lafourcade, Mónica; Gaete Argel, Aracelly Janis; Soto Rifo, Ricardo Andrés; Valiente Echeverría, Fernando Andrés (Oxford University Press, 2022)

We report neutralizing antibody titers (NAbTs) elicited by CoronaVac and BNT162b2 vaccines in healthcare workers with and without prior SARS-CoV-2 infection using both a pseudotype-based assay and a commercial kit. NAbTs ...

Differential Severe Acute Respiratory Syndrome Coronavirus 2-Specific Humoral Response in Inactivated Virus-Vaccinated, Convalescent, and Breakthrough-Infected Subjects

Duarte Peñaloza, Luisa Fernanda; Vazquez Hernandez Yaneisi; Diethelm Varela, Benjamin Manuel; Pavez, Valentina; Berrios-Rojas, Roslye; Riedel, Claudia A.; Mendez, Constanza; White, Jessica A.; Kalergis Parra, Alexis Mikes; Bueno Ramírez, Susan Marcela; González Muñoz, Pablo Alberto (OXFORD UNIV PRESS INC, 2023)

Background. We sought to identify potential antigens for discerning between humoral responses elicited after vaccination with CoronaVac (a severe acute respiratory syndrome coronavirus 2 [SARS-CoV-2] inactivated vaccine), ...

The effectiveness of Vaxzevria and CoronaVac vaccines: A nationwide longitudinal retrospective study of 61 million Brazilians (VigiVac-COVID19)

Silva, Thiago Cerqueira; Oliveira, Vinicius de Araújo; Pescarini, Julia; Bertoldo Júnior, Juracy; Machado, Tales Mota; Ortiz, Renzo Flores; Penna, Gerson; Ichihara, Maria Yury; Barros, Jacson Venâncio de; Boaventura, Viviane S.; Barreto, Mauricio L.; Werneck, Guilherme Loureiro; Barral-Netto, Manoel (BMJ Publishing Group, 2021)

Serological study of CoronaVac vaccine and booster doses in Chile: immunogenicity and persistence of anti-SARS-CoV-2 spike antibodies

Vargas, Leonardo; Valdivieso Berríos, Nicolás Alejandro; Tempio, Fabián; Simon Zegers, María Valeska; Sauma Mahaluf, Daniela Macarena; Valenzuela Pérez, Lucía Teresita; Beltrán Muñoz, Caroll Jenny; Castillo Delgado, Loriana Cecilia; Contreras Benavides, Ximena Stella; Acevedo Acevedo, Mónica Loreto; Acevedo, Johanna; González, Rafael I.; Valiente Echeverría, Fernando Andres; Soto Rifo, Ricardo Andrés; Rosemblatt Silber, Mario César; López Nitsche, Mercedes Natalia; Osorio Olivares, Fabiola Beatriz; Bono Merino, María Rosa (BMC, 2022)

Background Chile was severely affected by COVID19 outbreaks but was also one of the first countries to start a nationwide program to vaccinate against the disease. Furthermore, Chile became one of the fastest countries to ...

Dynamic IgG seropositivity after rollout of CoronaVac and BNT162b2 COVID-19 vaccines in Chile: a sentinel surveillance study

Sauré Valenzuela, Denis Roland; O'Ryan Gallardo, Miguel Luis; Torres, Juan Pablo; Zúñiga, Marcela; Santelices Cuevas, Emilio Gabriel; Basso Sotz, Leonardo Javier (Elsevier, 2022)

Background By July 14, 2021, 81.3 % of adults (aged >= 18 years) in Chile had received a first SARS-CoV-2 vaccine and 72.3% had received a second SARS-CoV-2 vaccine, with the majority of people given Sinovac's inactivated ...

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