Fig. 1From: Predictive determinants of overall survival among re-infected COVID-19 patients using the elastic-net regularized Cox proportional hazards model: a machine-learning algorithmThe overall non-parametric Kaplan-Meier survival estimates for the re-infected COVID-19 patients (solid line) and their corresponding 95% CI (dashed lines) (the total analysis time at risk and under observation was equal to 1250 days) Back to article page