Fig. 2.

The global model predicting recent COVID-19 positive test results using self-reported symptoms and minimal demographic data. (A) The receiver operating characteristic of the hyperparameter tuned global model showing the area under the curve. (B) The SHapley Additive exPlanations distribution of relative feature importance from the global model (green diamonds) compared to country/territory models (box and whisker plots). The within-model feature importance was normalized to loss of smell/taste to facilitate between-model comparison.