A retrospective study [9] including 350 COVID-19 (+ve) cases assessed the initial plain chest radiographs at the time of presentation and the follow-up chest X-ray for the same patients using the RALE scoring system [22]; it found a significant statistical correlation of the maximum total severity score and time to maximum score to the patients outcome (alive or dead) and concluded that CX-SS are a good monitor of COVID-19 chest manifestations and that its scoring system provides an accurate method to predict the disease severity.