Fig. 1. Infection confers better protection against symptomatic COVID-19 than vaccination in transplant recipients.

Protection against COVID-19 was compared between renal transplant recipients with previous history of infection with SARS-CoV-2 (group “infected”, gray curve) and those who received the standard two-dose regimen of mRNA-1273 (group “vaccinated”, black curve). The follow-up started at the time of COVID-19 symptoms onset for infected patients and at the time of the second vaccine administration for the vaccinated patients. Cumulative incidence in the two groups was plotted using the Kaplan–Meier method. Data were analyzed by a Log-rank test; p=0.0286.