Six months follow up of hemodialysis patients after SARS-CoV-2 vaccinations: Effects of the booster dose and vaccine t

Authors : Ahmet MURT, Mehmet Riza ALTİPARMAK, Harika Oyku DİNC, Serkan Feyyaz YALİN, Meral MESE, Serap YADİGAR, Zeynep YİLDİZ, Bekir KOCAZEYBEK, Meltem PEKPAK, Muveddet Rezzan ATAMAN

Pages : 165-172

Doi:10.5798/dicletip.1313206

View : 28 | Download : 39

Publication Date : 2023-06-12

Article Type : Research Paper

Abstract :Background: As hemodialysis patients are among the vulnerable groups for severe COVID-19, proper vaccination of these patients is quite important. However vaccine responsiveness is generally reduced in hemodialysis patients and strategies should be developed to maintain protection in the long term. Objectives: This study aimed to analyse the changes in antibody levels of SARS-CoV-2 vaccinated hemodialysis patients after six months and to compare the effectiveness of inactivated and mRNA vaccines. Methods: Eighty-five hemodialysis patients were followed up for six months after their initial vaccinations for SARS-CoV-2. Persistence of humoral responses were compared between patients who got inactivated or mRNA vaccines and also between patients who received a booster dose and those who didn’t. SARS-CoV-2 antibody titers were measured by a commercial test that measures IgG antibodies toward the receptor-binding domain of spike protein. Results: Seropositivity that was achieved by initial vaccination dropped abruptly by 6 months. Patients who received a booster dose had significantly higher antibody levels than those who didn’t insert ignore into journalissuearticles values(1120,8 ± 983,3 AU/mL vs 313,3 ± 435,3 AU/mL respectively; p<0,001); and higher seropositivity as well insert ignore into journalissuearticles values(88% vs 65%);. Seropositivity with mRNA vaccine at the end of 6th month was 81,8% while this decreased to 50% for inactivated vaccine. Patients who received mRNA vaccine initially or as the third dose could maintain 88,4% of seropositivtiy and this was higher than other patients who have just got inactivated vaccine insert ignore into journalissuearticles values(p=0,013);. Conclusion: Humoral immune response by SARS-CoV-2 vaccines is not very stable in hemodialysis patients and planning the booster doses should not be delayed. mRNA vaccines have better immunogenicity than inactivated vaccines.
Keywords : SARS CoV 2, immunization, vaccines, hemodialysis, protection