In the article titled “Simulation of the Final Size of the Evolution Curve of Coronavirus Epidemic in Morocco using the SIR Model” [1], the code used for this study was from the work of Prof. Batista [2, 3], which was not cited. The authors apologize for this omission.

It is also noted that the use of a simple SIR model to predict the development of COVID-19 in its early stage was limited and did not account for parameters such as containment measures.