Examinando por Materia "Vaccines"
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- PublicaciónAcceso abiertoNetwork analysis of the relationships between conspiracy beliefs towards COVID-19 vaccine and symptoms of fear of COVID-19 in a sample of latin american countries(2022-09-07) Caycho-Rodríguez, Tomás; Ventura-León, José; Valencia, Pablo D.; Vilca, Lindsey W.; Carbajal-León, Carlos; Reyes-Bossio, Mario; Delgado-Campusano, Mariel; Rojas-Jara, Claudio; Polanco-Carrasco, Roberto; Gallegos, Miguel; Cervigni, Mauricio; Martino, Pablo; Palacios, Diego Alejandro; Moreta-Herrera, Rodrigo; Samaniego-Pinho, Antonio; Lobos Rivera, Marlon Elías; Buschiazzo Figares, Andrés; Puerta-Cortés, Diana Ximena; Corrales-Reyes, Ibraín Enrique; Calderón, Raymundo; Pinto Tapia, Bismarck; Arias Gallegos, Walter L.; Petzold, OlimpiaThe present study examined how conspiracy beliefs about COVID-19 vaccines specifically relate to symptoms of fear of COVID-19 in a sample of four South American countries. A total of 1785 people from Bolivia, Colombia, Ecuador, and Peru participated, responding to a sociodemographic survey, the Fear of COVID-19 scale (FCV-19 S) and the Vaccine Conspiracy Beliefs Scale-COVID-19 (VCBS-COVID-19). Network analysis identified the most important symptoms of fear and conspiracy beliefs about COVID-19 vaccines (nodes) and the associations between them (edges). In addition, the robustness of the network of these indicators of centrality and the possible differences in the structure and connectivity of the networks between the four countries were evaluated. The results suggest that the nodes with the highest centrality were items 2 and 5 of the FCV-19 S and item 2 of the VCBS-COVID-19. Likewise, item 6 is the belief that most predicts conspiracy beliefs about vaccines against COVID-19; while item 6 was the symptom that most predicts fear of COVID-19. The findings strongly support cross-cultural similarities in the networks across the four countries rather than differences. Although it was expected that a higher presence of symptoms of fear of COVID-19 may lead people to compensate for their fear by believing in conspiratorial ideas about vaccines and, consequently, rejecting the COVID-19 vaccine, the results do not clearly show this relationship. This could lead other researchers to generate evidence to explain the differences between Latin American countries and countries in other contexts in terms of vaccination rates. This evidence could be useful to develop policies favoring vaccination against COVID-19 that are more contextualized to the Latin American region, characterized by social instability and economic recession during the pandemic.
- PublicaciónSólo datosVoltammetric determination of thiomersal with a new modified electrode based on a carbon paste electrode decorated with La2O3(Journal of Electroanalytical Chemistry, 2019-01-15) Penagos Llanos, Johisner; Calderón, Jorge A.; Nagles, Edgar; Hurtado, Jhon J.A carbon-paste modified electrode decorated with La2O3 (LaOx/CPE) is reported for the first time for the voltammetric determination of thiomersal (THM) content. The LaOx/CPE surface was characterized using cyclic voltammetry (CV), electrochemical impedance spectroscopy (EIS) and scanning electron microscopy (SEM). The presence of La2O3 on the surface of the carbon paste reduces the charge transfer resistance and improves the sensitivity toward the oxidation of THM, with an oxidation current increase of almost 60% and allows its determination by square-wave stripping voltammetry (SWSV). The detection limit (3σ/b) was 0.09 μmol L−1 and the relative standard deviation was 2.5% (n = 7) with three different electrodes. Furthermore, the new sensor was applied in the detection of THM in vaccines and pharmaceutical dosages.