Study Findings on COVID-19 Published by Researchers at University of Desarrollo (Immunization and SARS-CoV-2 Antibody Seroprevalence in a Country with High Vaccination Coverage: Lessons from Chile): Coronavirus – COVID-19

Vaccine Daily

2022 AUG 05 (NewsRx) -- By a News Reporter-Staff News Editor at Vaccine Daily -- Researchers detail new data in COVID-19. According to news reporting from Santiago, Chile, by NewsRx journalists, research stated, “Chile is among the most successful nations worldwide in terms of its COVID-19 vaccine rollout. By 31 December 2021, 84.1% of the population was fully vaccinated, and 56.1% received booster doses using different COVID-19 vaccines.”

Funders for this research include World Health Organization.

The news reporters obtained a quote from the research from University of Desarrollo: “In this context, we aimed to estimate the prevalence of anti-SARS-CoV-2 antibodies following the infection and vaccination campaign. Using a three-stage stratified sampling, we performed a population-based cross-sectional serosurvey based on a representative sample of three Chilean cities. Selected participants were blood-sampled on-site and answered a short COVID-19 and vaccination history questionnaire using Wantai SARS-CoV-2 Ab ELISA to determine seroprevalence. We recruited 2198 individuals aged 7-93 between 5 October and 25 November 2021; 2132 individuals received COVID-19 vaccinations (97%), 67 (3.1%) received one dose, 2065 (93.9%) received two doses, and 936 received the booster jab (42.6%). Antibody seroprevalence reached 97.3%, ranging from 40.9% among those not vaccinated to 99.8% in those with booster doses (OR = 674.6, 154.8-2938.5). SARS-CoV-2 antibodies were associated with vaccination, previous COVID-19 diagnosis, age group, and city of residence.”

According to the news editors, the research concluded: “In contrast, we found no significant differences in the type of vaccine used, education, nationality, or type of health insurance. We found a seroprevalence close to 100%, primarily due to the successful vaccination program, which strongly emphasizes universal access.”

For more information on this research see: Immunization and SARS-CoV-2 Antibody Seroprevalence in a Country with High Vaccination Coverage: Lessons from Chile. Vaccines, 2022,10(1002):1002. (Vaccines - http://www.mdpi.com/journal/vaccines). The publisher for Vaccines is MDPI AG.

A free version of this journal article is available at https://doi.org/10.3390/vaccines10071002.

Our news journalists report that more information may be obtained by contacting Ximena Aguilera, Centro de Epidemiologia y Politicas de Salud, Facultad de Medicina Clinica Alemana, University of Desarrollo, San Carlos de Apoquindo, Las Condes, Santiago 7610658, Chile. Additional authors for this research include Claudia Gonzalez, Mauricio Apablaza, Paola Rubilar, Gloria Icaza, Muriel Ramirez-Santana, Claudia Perez, Lina Jimena Cortes, Loreto Nunez-Franz, Ruben Quezada-Gaete, Carla Castillo-Laborde, Juan Correa, Macarena Said, Juan Hormazabal, Cecilia Vial, Pablo Vial.