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Prevalence of SARS-CoV-2 infection among urban cleaning and solid waste management workers during transmission of the Omicron variant in Brazil
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Paulo Ricardo Martins-Filho, Joyce Thayane da Conceição dos Santos, Márcia Santos Rezende, Fernanda Oliveira de Carvalho, Érica Santos dos Reis, Waneska de Souza Barboza, Taise Ferreira Cavalcante, Cliomar Alves dos Santos, Lucindo José Quintans-Júnior, Renata Grespan, Cristiane Bani Corrêa, Tatiana Rodrigues de Moura, Dulce Marta Schimieguel, Jullyana de Souza Siqueira Quintans, Adriano Antunes de Souza Araújo
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Epidemiol Health. 2023;45:e2023025. Published online February 16, 2023
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DOI: https://doi.org/10.4178/epih.e2023025
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Abstract
This study estimated the prevalence of severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) infection in urban cleaning and solid waste management workers during the transmission of the Omicron variant in one of the poorest regions of Brazil (the state of Sergipe). Nasopharyngeal swabs were collected from 494 workers, and the presence of SARS-CoV-2 RNA was tested by quantitative reverse-transcriptase polymerase chain reaction. Data on socio-demographic characteristics, comorbidities, vaccination status, mask use, and use of public transport to commute to the workplace were collected. The prevalence with a 95% confidence interval (CI) was calculated from the proportion of SARS-CoV-2 positive cases among the total number of individuals tested. The prevalence ratio (PR) with a 95% CI was the measure of association used to evaluate the relationship between SARS-CoV-2 infection and the exposure variables. The prevalence of SARS-CoV-2 infection was 22.5% (95% CI, 19.0 to 26.4). Individuals under the age of 40 had a higher prevalence of infection (PR, 1.53; 95% CI, 1.03 to 2.30) as well as those who did not believe in the protective effect of vaccines (PR, 1.78; 95% CI, 1.05 to 2.89). Our results indicate the need for better guidance on preventive measures against coronavirus disease 2019 among urban cleaning and solid waste management workers.
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Summary
Key Message
Urban cleaning and waste management workers in Brazil faced a significant risk of SARSCoV-2 infection during the Omicron variant transmission, with higher rates observed among younger individuals and those skeptical about vaccine protection.
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Dynamics of hospitalizations and in-hospital deaths from COVID-19 in northeast Brazil: a retrospective analysis based on the circulation of SARS-CoV-2 variants and vaccination coverage
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Paulo Ricardo Martins-Filho, Adriano Antunes de Souza Araújo, Lucindo José Quintans-Júnior, Bárbara dos Santos Soares, Waneska de Souza Barboza, Taise Ferreira Cavalcante, Victor Santana Santos
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Epidemiol Health. 2022;44:e2022036. Published online April 5, 2022
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DOI: https://doi.org/10.4178/epih.e2022036
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Abstract
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Abstract
This study investigated the dynamics of hospitalizations and in-hospital deaths from coronavirus disease 2019 (COVID-19) throughout the pandemic in northeast Brazil, the Brazilian region with the worst socioeconomic indicators. In total, 141,445 cases, 8,213 hospital admissions, and 1,644 in-hospital deaths from COVID-19 were registered from March 14, 2020 to February 5, 2022. The overall rates of hospitalization and in-hospital deaths were 5.8% and 20.0%, respectively. The hospitalization and death rates significantly decreased over time, which may have been related to progress in vaccination. During the spread of the Gamma variant (January to June 2021), most hospitalized individuals were young adults, and approximately 40% of deaths occurred in this age group. During the predominance of Delta (July to December 2021), over 75% of deaths occurred among the elderly and unvaccinated or partially vaccinated individuals. This rate decreased to 42.3% during the transmission of the Omicron variant (January to February 2022), during which 34.6% of deaths were recorded among fully vaccinated individuals (2 doses) and 23.1% among those who received full vaccination and a booster. The Omicron-driven third wave was associated with a rise in the proportion of deaths among vaccinated individuals, especially among those who had not received a booster dose.
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Summary
Key Message
The Omicron-driven third wave in Brazil was associated with a rise in the proportion of deaths among vaccinated individuals, especially among those who had not received a booster dose
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Citations
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