Esra Karaca
Current Organizations / Institutes
The organizations/institutes from the scholar's latest article
Research Subjects
Esra Karaca has a total of 9 co-authors. Here are the top co-authors by number of shared publications:
- Ali Ağaçfidan
Department of Medical Microbiology, Istanbul Faculty of Medicine, Istanbul University, 34093 Istanbul, Turkey
1 shared publication - Ayşe Rumeysa Doğruyol
Department of Public Health, Istanbul Faculty of Medicine, Istanbul University, Istanbul 34116, Turkey
1 shared publication - Gökçe Hazar Otçu
Department of Public Health, Istanbul Faculty of Medicine, Istanbul University, Istanbul 34116, Turkey
1 shared publication - Meryem Merve Oren
Department of Public Health, Istanbul Faculty of Medicine, Istanbul University, İstanbul, Turkiye
1 shared publication - Nuray Özgülnar
Department of Public Health, Istanbul Medicine Faculty, Istanbul University, 34093 Istanbul, Turkey
1 shared publication - Sevgi Canbaz
Department of Public Health, Istanbul Faculty of Medicine, Istanbul University, Topkapı, 34093 İstanbul, Turkey
1 shared publication
Latest Publications
- Open Access
Impact of Health Workers’ Choice of COVID-19 Vaccine Booster on Immunization Levels in Istanbul, Turkey
Background: There are limited data regarding short- and medium-term IgG antibody levels after the CoronaVac and BNT162b2 vaccines. This study aimed to investigate the antibody responses of health workers who initially received two doses of CoronaVac one month apart followed by a booster dose of either CoronaVac or BNT162b2, as well as determine whether either vaccine provided superior results. Methods: This research represents the second phase of a mixed-methods vaccine cohort study and was conducted between July 2021 and February 2022. The participants (n = 117) were interviewed in person and blood samples were collected before and at 1 and 6 months after the booster vaccination. Results: BNT162b2 was found to have greater immunogenic potential than CoronaVac (p < 0.001). Health workers without chronic disease exhibited statistically significant increases in antibody levels after both vaccines (p < 0.001), whereas only BNT162b2 caused a significant increase in antibody levels in participants with chronic disease (p < 0.001). Samples obtained before and at 1 and 6 months after the booster vaccination revealed no age- or sex-based differences in IgG-inducing potential for either vaccine (p > 0.05). Antibody levels were comparable in both vaccine groups before the booster regardless of COVID-19 history (p > 0.05); however, antibody levels were significantly higher after the BNT162b2 booster at 1 month (p < 0.001). Conclusions: Our results suggest that even a single booster dose of BNT162b2 after initial vaccination with CoronaVac provides a protective advantage against COVID-19, especially for risk groups such as health workers and those with chronic diseases.
Open AccessImpact of Health Workers’ Choice of COVID-19 Vaccine Booster on Immunization Levels in Istanbul, Turkey
Background: There are limited data regarding short- and medium-term IgG antibody levels after the CoronaVac and BNT162b2 vaccines. This study aimed to investigate the antibody responses of health workers who initially received two doses of CoronaVac one month apart followed by a booster dose of either CoronaVac or BNT162b2, as well as determine whether either vaccine provided superior results. Methods: This research represents the second phase of a mixed-methods vaccine cohort study and was conducted between July 2021 and February 2022. The participants (n = 117) were interviewed in person and blood samples were collected before and at 1 and 6 months after the booster vaccination. Results: BNT162b2 was found to have greater immunogenic potential than CoronaVac (p < 0.001). Health workers without chronic disease exhibited statistically significant increases in antibody levels after both vaccines (p < 0.001), whereas only BNT162b2 caused a significant increase in antibody levels in participants with chronic disease (p < 0.001). Samples obtained before and at 1 and 6 months after the booster vaccination revealed no age- or sex-based differences in IgG-inducing potential for either vaccine (p > 0.05). Antibody levels were comparable in both vaccine groups before the booster regardless of COVID-19 history (p > 0.05); however, antibody levels were significantly higher after the BNT162b2 booster at 1 month (p < 0.001). Conclusions: Our results suggest that even a single booster dose of BNT162b2 after initial vaccination with CoronaVac provides a protective advantage against COVID-19, especially for risk groups such as health workers and those with chronic diseases.