SARS-CoV-2 and chronic kidney disease: challenges and future directions

Patients with chronic kidney disease (CKD), especially those with end-stage kidney disease on dialysis or kidney transplant recipients (KTRs), are highly susceptible to infections, including the novel severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2). The COVID-19 pandemic disproportionately affected this vulnerable population, leading to increased morbidity and mortality. Immune dysfunction in CKD patients contributes to a suboptimal defense against infections and a reduced response to SARS-CoV-2 vaccinations. Although vaccination has significantly reduced severe outcomes, dialysis patients and KTRs exhibit lower seroconversion rates and faster antibody waning compared to the general population. Recent evidence suggests that booster doses improve immune responses, but vaccine efficacy remains lower in immunosuppressed individuals. This review highlights the epidemiology of COVID-19 in nephropathic patients, the mechanisms underlying their immune dysregulation, and the effectiveness of vaccination strategies. Future directions include optimizing booster regimens, integrating serological and avidity testing to tailor vaccination strategies, and exploring novel immunotherapeutic approaches. A multidisciplinary effort involving nephrologists, immunologists, and public health experts is essential to improve pandemic preparedness and develop targeted strategies to protect nephropathic patients from future viral threats.