Skip to main page content
U.S. flag

An official website of the United States government

Dot gov

The .gov means it’s official.
Federal government websites often end in .gov or .mil. Before sharing sensitive information, make sure you’re on a federal government site.

Https

The site is secure.
The https:// ensures that you are connecting to the official website and that any information you provide is encrypted and transmitted securely.

Access keys NCBI Homepage MyNCBI Homepage Main Content Main Navigation

Search Page

Filters

My Custom Filters

Publication date

Text availability

Article attribute

Article type

Additional filters

Article Language

Species

Sex

Age

Other

Search Results

10 results

Filters applied: . Clear all
Results are displayed in a computed author sort order. The Publication Date timeline is not available.
Page 1
Understanding how socioeconomic inequalities drive inequalities in COVID-19 infections.
Laajaj R, Webb D, Aristizabal D, Behrentz E, Bernal R, Buitrago G, Cucunubá Z, de la Hoz F, Gaviria A, Hernández LJ, De Los Rios C, Ramírez Varela A, Restrepo S, Schady N, Vives M. Laajaj R, et al. Sci Rep. 2022 May 18;12(1):8269. doi: 10.1038/s41598-022-11706-7. Sci Rep. 2022. PMID: 35585211 Free PMC article.
COVID-19 spread, detection, and dynamics in Bogota, Colombia.
Laajaj R, De Los Rios C, Sarmiento-Barbieri I, Aristizabal D, Behrentz E, Bernal R, Buitrago G, Cucunubá Z, de la Hoz F, Gaviria A, Hernández LJ, León L, Moyano D, Osorio E, Varela AR, Restrepo S, Rodriguez R, Schady N, Vives M, Webb D. Laajaj R, et al. Nat Commun. 2021 Aug 5;12(1):4726. doi: 10.1038/s41467-021-25038-z. Nat Commun. 2021. PMID: 34354078 Free PMC article.
Smart pooling: AI-powered COVID-19 informative group testing.
Escobar M, Jeanneret G, Bravo-Sánchez L, Castillo A, Gómez C, Valderrama D, Roa M, Martínez J, Madrid-Wolff J, Cepeda M, Guevara-Suarez M, Sarmiento OL, Medaglia AL, Forero-Shelton M, Velasco M, Pedraza JM, Laajaj R, Restrepo S, Arbelaez P. Escobar M, et al. Among authors: laajaj r. Sci Rep. 2022 Apr 20;12(1):6519. doi: 10.1038/s41598-022-10128-9. Sci Rep. 2022. PMID: 35444162 Free PMC article.
Prediction of SARS-CoV-2 infection with a Symptoms-Based model to aid public health decision making in Latin America and other low and middle income settings.
Ramírez Varela A, Moreno López S, Contreras-Arrieta S, Tamayo-Cabeza G, Restrepo-Restrepo S, Sarmiento-Barbieri I, Caballero-Díaz Y, Jorge Hernandez-Florez L, Mario González J, Salas-Zapata L, Laajaj R, Buitrago-Gutierrez G, de la Hoz-Restrepo F, Vives Florez M, Osorio E, Sofía Ríos-Oliveros D, Behrentz E. Ramírez Varela A, et al. Among authors: laajaj r. Prev Med Rep. 2022 Jun;27:101798. doi: 10.1016/j.pmedr.2022.101798. Epub 2022 Apr 20. Prev Med Rep. 2022. PMID: 35469291 Free PMC article.
Effectiveness and adherence to closed face shields in the prevention of COVID-19 transmission: a non-inferiority randomized controlled trial in a middle-income setting (COVPROSHIELD).
Varela AR, Gurruchaga AP, Restrepo SR, Martin JD, Landazabal YDC, Tamayo-Cabeza G, Contreras-Arrieta S, Caballero-Díaz Y, Florez LJH, González JM, Santos-Barbosa JC, Pinzón JD, Yepes-Nuñez JJ, Laajaj R, Buitrago Gutierrez G, Florez MV, Fuentes Castillo J, Quinche Vargas G, Casas A, Medina A, Behrentz E; CoVIDA Working Group. Varela AR, et al. Among authors: laajaj r. Trials. 2022 Aug 20;23(1):698. doi: 10.1186/s13063-022-06606-0. Trials. 2022. PMID: 35987694 Free PMC article. Clinical Trial.
Factors Associated With SARS-CoV-2 Infection in Bogotá, Colombia: Results From a Large Epidemiological Surveillance Study.
Varela AR, Florez LJH, Tamayo-Cabeza G, Contreras-Arrieta S, Restrepo SR, Laajaj R, Gutierrez GB, Guevara YPR, Caballero-Díaz Y, Florez MV, Osorio E, Barbieri IS, Sanchez DR, Nuñez LL, Bernal R, Oliveros SR, Zapata LS, Guevara-Suarez M, Uribe AG, Behrentz E. Varela AR, et al. Among authors: laajaj r. Lancet Reg Health Am. 2021 Oct;2:100048. doi: 10.1016/j.lana.2021.100048. Epub 2021 Aug 23. Lancet Reg Health Am. 2021. PMID: 34458886 Free PMC article.
Assessing pandemic preparedness, response, and lessons learned from the COVID-19 pandemic in four south American countries: agenda for the future.
Ramírez Varela A, Touchton M, Miranda JJ, Grueso JM, Laajaj R, Carrasquilla G, Florez MV, Gaviria AMV, Hoyos AMO, Duarte EOV, Morales AV, Velasco N, Restrepo SR. Ramírez Varela A, et al. Among authors: laajaj r. Front Public Health. 2023 Nov 29;11:1274737. doi: 10.3389/fpubh.2023.1274737. eCollection 2023. Front Public Health. 2023. PMID: 38094236 Free PMC article.
Risk factors for SARS-CoV-2 transmission in close contacts of adults at high risk of infection due to occupation: results from the contact tracing strategy of the CoVIDA epidemiological surveillance study in Bogotá, Colombia, in 2020-2021.
Ramírez Varela A, Contreras-Arrieta S, Tamayo-Cabeza G, Salas Zapata L, Caballero-Díaz Y, Hernández Florez LJ, Benavidez AP, Laajaj R, De la Hoz F, Buitrago Gutierrez G, Restrepo S, Behrentz E; CoVIDA working group. Ramírez Varela A, et al. Among authors: laajaj r. BMJ Open. 2022 Dec 23;12(12):e062487. doi: 10.1136/bmjopen-2022-062487. BMJ Open. 2022. PMID: 36564109 Free PMC article.