Bahadir, SuzanKabacaoglu, EbruMemis, Kemal BugraHasan, Hasan IlksenAydin, Sonay2024-09-112024-09-112023https://www.ncbi.nlm.nih.gov/pmc/articles/PMC10458389/pdf/vaccines-11-01321.pdfhttp://hdl.handle.net/11727/12200Although vaccines have been shown to reduce the number of COVID-19 infection cases significantly, vaccine-related reactions, long COVID-19 syndrome, and COVID-19 infection following vaccination continue to be a burden on healthcare services and warrant further scientific research. The purpose of this study was to research the severity of pulmonary COVID-19 infection following vaccination and the sequelae rates of recurrent infections in vaccinated cases by imaging. Patients who underwent follow-up CTs at 1 month, 3 months, and 6 months in our hospital with a diagnosis of COVID-19 were scanned retrospectively. Furthermore, all essential information was gathered from patients' immunization records. The major findings of our study were: (1) sequelae were frequently observed in unvaccinated cases; (2) the correlation between vaccination status and the severity of sequelae was significant; (3) there was not any significant relationship between the vaccine type and the severity of sequelae; and (4) hematocrit, hemoglobin, and lymphocyte parameters may be used as predictors of sequelae rates. COVID-19 infection, although reduced in prevalence following the development of vaccines, still remains a public health concern because of reinfection. Vaccination not only appears to protect against primary infection, but also seems to reduce reinfection and sequalae rates following reinfection.enginfo:eu-repo/semantics/openAccesscoronavirus diseasethorax CTvaccinationreinfectionlung complicationssequelaearticle1180010568212000012-s2.0-851689945852076-393X