H ealth authorities worldwide began to recognize the enormity of the coronavirus disease 2019 pandemic late in the first quarter of 2020. The daunting public health implications of the pandemic for people with kidney disease has since become increasingly clear. Indeed, reports on the impact of COVID-19 in people with kidney disease have appeared at a rate unprecedented in the history of nephrology.In this issue of AJKD, the report by Chung et al 1 provides important insights into 2 questions of supreme importance: What is the incidence of COVID-19 in people with kidney disease? and What is the association between COVID-19 and death in people with kidney disease? The investigators found that the incidence of COVID-19 in patients with chronic kidney disease (CKD) treated with dialysis was 105 per 10,000 person-weeks; in patients with CKD not requiring kidney replacement therapy (KRT), 16 per 10,000 person-weeks; and in kidney transplant recipients (KTRs), 23 per 10,000 person-weeks. Compared with patients with CKD without KRT, therefore, incidence of COVID-19 is roughly 6 times higher in maintenance dialysis patients and roughly oneand-a-half times higher in KTRs. Regarding the issue of risk of death associated with COVID-19 among people with kidney disease, the authors report that, compared with patients receiving dialysis who did not have COVID-19, the incidence rate ratio (IRR) for death in affected dialysis patients was approximately 8. Analogously, KTRs with COVID-19 had an IRR for death of 42 compared with KTRs who did not have COVID-19. (Owing to a lack of suitable studies, IRRs for CKD without KRT could not be estimated.)Quantifying the incidence of COVID-19 and COVID-19-related death is obviously of crucial importance, yet generating insights into the relationship between kidney disease and risk of these outcomes is more complex than it first appears. If the goal is to determine the additional risks for COVID-19 and COVID-19-related death associated with kidney disease, merely comparing rates among people with kidney disease to rates in the general population may be inadequate. This is because people with kidney disease have high rates of accompanying comorbid conditions such as diabetes, atherosclerotic vascular disease, heart failure, and others that are themselves likely to confer increased risk for COVID-19 and COVID-19-related death. An early indication that kidney disease is a risk factor for COVID-19-related death emerged from the UK's National Health Service