Prevalence of COVID-19 among healthcare workers before and after vaccination
Background and Objectives: healthcare workers are at high risk of acquiring infections during disease outbreaks. Therefore, this study aimed to determine the prevalence of COVID-19 among vaccinated and unvaccinated healthcare workers. Methods: a cross-sectional and observational study that assessed...
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| Format: | Article |
| Language: | Portuguese |
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Universidade de Santa Cruz do Sul
2025-01-01
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| Series: | Revista de Epidemiologia e Controle de Infecção |
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| Online Access: | https://online.unisc.br/seer/index.php/epidemiologia/article/view/19221 |
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| author | Karina Pinheiro Teixeira dos Reis Mirelle de Oliveira Saes Ivy Bastos Ramis |
| author_facet | Karina Pinheiro Teixeira dos Reis Mirelle de Oliveira Saes Ivy Bastos Ramis |
| author_sort | Karina Pinheiro Teixeira dos Reis |
| collection | DOAJ |
| description | Background and Objectives: healthcare workers are at high risk of acquiring infections during disease outbreaks. Therefore, this study aimed to determine the prevalence of COVID-19 among vaccinated and unvaccinated healthcare workers. Methods: a cross-sectional and observational study that assessed cases of flu syndrome that occurred between March 2020 and December 2021 in healthcare workers vaccinated and unvaccinated with CoronaVac or Astrazeneca in a hospital in the extreme south of Brazil. The study included cases of flu syndrome characterized and monitored by the institution’s occupational health sector and who underwent diagnostic tests by RT-PCR for SARS-CoV-2. The Prevalence Ratio estimated by Poisson regression analysis with variance adjustment was used to verify the factors and strengths of the associations. Results: a total of 1,088 cases of flu syndrome that occurred in healthcare workers between 2020 and 2021 were assessed. When adjusted for sex, age, role, sector, type of vaccine or previous diagnosis of COVID-19, the prevalence of COVID-19 among cases of unvaccinated workers was 51.5% (95% CI: 46.5- 56.5) and 32.1% (95% CI: 25.3-38.8) among unvaccinated workers. Moreover, COVID-19 vaccination reduced the prevalence of new infections by 33% (PR: 0.67; 95% CI: 0.56-0.81). Conclusion: COVID-19 vaccination significantly reduced the prevalence of COVID-19 among healthcare workers, regardless of sex, age, sector, role, type of vaccine or previous diagnosis of COVID-19. |
| format | Article |
| id | doaj-art-261f2f5cb1024501b11a668001409007 |
| institution | Kabale University |
| issn | 2238-3360 |
| language | Portuguese |
| publishDate | 2025-01-01 |
| publisher | Universidade de Santa Cruz do Sul |
| record_format | Article |
| series | Revista de Epidemiologia e Controle de Infecção |
| spelling | doaj-art-261f2f5cb1024501b11a6680014090072025-01-20T19:22:55ZporUniversidade de Santa Cruz do SulRevista de Epidemiologia e Controle de Infecção2238-33602025-01-0114410.17058/reci.v14i4.1922118595Prevalence of COVID-19 among healthcare workers before and after vaccinationKarina Pinheiro Teixeira dos ReisMirelle de Oliveira SaesIvy Bastos RamisBackground and Objectives: healthcare workers are at high risk of acquiring infections during disease outbreaks. Therefore, this study aimed to determine the prevalence of COVID-19 among vaccinated and unvaccinated healthcare workers. Methods: a cross-sectional and observational study that assessed cases of flu syndrome that occurred between March 2020 and December 2021 in healthcare workers vaccinated and unvaccinated with CoronaVac or Astrazeneca in a hospital in the extreme south of Brazil. The study included cases of flu syndrome characterized and monitored by the institution’s occupational health sector and who underwent diagnostic tests by RT-PCR for SARS-CoV-2. The Prevalence Ratio estimated by Poisson regression analysis with variance adjustment was used to verify the factors and strengths of the associations. Results: a total of 1,088 cases of flu syndrome that occurred in healthcare workers between 2020 and 2021 were assessed. When adjusted for sex, age, role, sector, type of vaccine or previous diagnosis of COVID-19, the prevalence of COVID-19 among cases of unvaccinated workers was 51.5% (95% CI: 46.5- 56.5) and 32.1% (95% CI: 25.3-38.8) among unvaccinated workers. Moreover, COVID-19 vaccination reduced the prevalence of new infections by 33% (PR: 0.67; 95% CI: 0.56-0.81). Conclusion: COVID-19 vaccination significantly reduced the prevalence of COVID-19 among healthcare workers, regardless of sex, age, sector, role, type of vaccine or previous diagnosis of COVID-19.https://online.unisc.br/seer/index.php/epidemiologia/article/view/19221covid-19sars-cov-2healthcare workersvaccine |
| spellingShingle | Karina Pinheiro Teixeira dos Reis Mirelle de Oliveira Saes Ivy Bastos Ramis Prevalence of COVID-19 among healthcare workers before and after vaccination Revista de Epidemiologia e Controle de Infecção covid-19 sars-cov-2 healthcare workers vaccine |
| title | Prevalence of COVID-19 among healthcare workers before and after vaccination |
| title_full | Prevalence of COVID-19 among healthcare workers before and after vaccination |
| title_fullStr | Prevalence of COVID-19 among healthcare workers before and after vaccination |
| title_full_unstemmed | Prevalence of COVID-19 among healthcare workers before and after vaccination |
| title_short | Prevalence of COVID-19 among healthcare workers before and after vaccination |
| title_sort | prevalence of covid 19 among healthcare workers before and after vaccination |
| topic | covid-19 sars-cov-2 healthcare workers vaccine |
| url | https://online.unisc.br/seer/index.php/epidemiologia/article/view/19221 |
| work_keys_str_mv | AT karinapinheiroteixeiradosreis prevalenceofcovid19amonghealthcareworkersbeforeandaftervaccination AT mirelledeoliveirasaes prevalenceofcovid19amonghealthcareworkersbeforeandaftervaccination AT ivybastosramis prevalenceofcovid19amonghealthcareworkersbeforeandaftervaccination |