1. World Health Organization (WHO). Coronavirus disease (COVID-19). Available from: <a href="https://www.who.int/health-topics/">https://www.who.int/health-topics/</a>[Accessed November1, 2022].
2. Australian Government Department of Health and Aged Care. About the COVID-19 pandemic. Available from: <a href="https://www.health.gov.au/health-alerts/covid-19/about">https://www.health.gov.au/health-alerts/covid-19/about</a>[Accessed November1, 2022].
3. Şimşek-Yavuz S, KomsuoğluÇelikyurt FI. An update of anti-viral treatment of COVID-19. Turk J Med Sci 2021;51:3372-90.
4. Pitts PJ. Our most powerful weapon to fight COVID-19: Patient involvement. Patient 2020;13:255.
5. Ndwandwe D, Wiysonge CS. COVID-19 vaccines. CurrOpinImmunol 2021;71:111-6.
6. Heinz FX, Stiasny K. Distinguishing features of current COVID-19 vaccines: knowns and unknowns of antigen presentation and modes of action. NPJ Vaccines 2021;6:104.
7. Available from: <a href="https://www.saglik.gov.tr/TR,78148/ilk-koronavirus-asisi-saglik-bakani-fahrettin-kocaya-yapildi.html">https://www.saglik.gov.tr/TR,78148/ilk-koronavirus-asisi-saglik-bakani-fahrettin-kocaya-yapildi.html</a>[Accessed November1, 2022].
8. World Health Organization (WHO). The sinovac-CoronaVac COVID-19 vaccine: What you need to know (Updated June 10, 2022). Available from:<a href="%20https:/www.who.int/news-room/feature-stories/detail/the-sinovac-covid-19-vaccine-what-you-need-to"> https://www.who.int/news-room/feature-stories/detail</a>[Accessed October 3, 2022].
9. Abbott ARCHITECT SARS-CoV-2 IgG II Quant Reagent Instructions for Use. April 2021.
10. Altmann DM, Boyton RJ. COVID-19 vaccination: The road ahead. Science 2022;375:1127-32.
11. Kaya Ş, Yıldırım MS, Kavak Ş, et al. Sağlıkpersonelinde COVID-19 aşısısonrası spike antikordüzeyleri ne durumda?. TJCL 2022;13:260-2.
12. Yigit M, Ozkaya-Parlakay A, Cosgun Y, Ince YE, Bulut YE, Senel E. Should a third booster dose be scheduled after two doses of CoronaVac? A single-center experience. J Med Virol 2022;94:287-90.
13. ŞenolAkar Ş, Akçalı S, Özkaya Y, et al. Sağlıkçalışanlarındainaktif SARS-CoV-2 aşılamasısonrasıyanetkiler, serokonversiyonoranlarıveantikoryanıtınıetkileyenfaktörler [Factors affecting side effects, seroconversion rates and antibody response after inactivated SARS-CoV-2 vaccination in healthcare workers]. MikrobiyolBul 2021;55:519-38.
14. Vural S, Hacıbekiroğlu M, Yıldız FR, Vural P. Pandemide COVID-19 geçirmişvegeçirmemişbirgrupsağlıkçalışanındaaşısonrasıgelişenimmünolojikcevap. ANKEM Derg 2021;35:45-52.
15. Montecino-Rodriguez E, Berent-Maoz B, Dorshkind K. Causes, consequences, and reversal of immune system aging. J Clin Invest 2013;123:958-65.
16. World Health Organization (WHO). A healthy lifestyle - WHO recommendations (Updated May6, 2020). Available from:<a href="https://www.who.int/europe/news-room/fact-sheets/">https://www.who.int/europe/news-room/fact-sheets/</a>[Accessed October 4, 2022].
17. Martí A, Marcos A, Martínez JA. Obesity and immune function relationships. Obes Rev 2001;2:131-40.
18. DemirTekol S, Altıntaş MM, Yılmaz E, Saracoğlu K, Demirhan R. Detection and evaluation of antibodies to SARS CoV-2 spike protein in healthcare workers after inactivated COVID-19 (CoronaVac) vaccination. SouthClinIstEuras 2021;32:217-22.
19. Pellini R, Venuti A, Pimpinelli F, et al. Initial observations on age, gender, BMI and hypertension in antibody responses to SARS-CoV-2 BNT162b2 vaccine. EClinicalMedicine 2021;36:100928.
20. Ferrara P, Gianfredi V, Tomaselli V, Polosa R. The effect of smoking on humoral response to COVID-19 vaccines: A systematic review of epidemiological studies. Vaccines (Basel) 2022;10:303.
21. Dundar B, Karahangil K, Elgormus CS, Topsakal HNH. Efficacy of antibody response following the vaccination of SARS-CoV-2 infected and noninfected healthcare workers by two-dose inactive vaccine against COVID-19. J Med Virol 2022;94:2431-7.
22. Ali H, Alahmad B, Al-Shammari AA, et al. Previous COVID-19 infection and antibody levels after vaccination. Front Public Health 2021;9:778243.
23. Bayram A, Demirbakan H, GünelKaradeniz P, Erdoğan M, Koçer I. Quantitation of antibodies against SARS-CoV-2 spike protein after two doses of CoronaVac in healthcare workers. J Med Virol 2021;93:5560-7.
24. Fonseca MHG, de Souza TFG, de CarvalhoAraújo FM, de Andrade LOM. Dynamics of antibody response toCoronaVac vaccine. J Med Virol 2022;94:2139-48.
25. Westhoff CM. The structure and function of the Rh antigen complex. SeminHematol 2007;44:42-50.
26. Kim Y, Latz CA, DeCarlo CS, et al. Relationship between blood type and outcomes following COVID-19 infection. SeminVascSurg 2021;34:125-31.
27. Bordino V, Vicentini C, Zotti CM. Response to 'Unlikely influence of ABO blood group polymorphism on antibody response to COVID-19 mRNA vaccine against SARS-CoV-2 spike protein'. Vox Sang 2022;117:1128.
28. Greco M, Cucci F, Portulano P, et al. Effects of influenza vaccination on the response to BNT162b2 messenger RNA COVID-19 vaccine in healthcare workers. J Clin Med Res 2021;13:549-55.
29. Candelli M, Pignataro G, Torelli E, et al. Effect of influenza vaccine on COVID-19 mortality: a retrospective study.Intern Emerg Med<em></em>2021;16:1849-55.