<p><strong>Introduction:</strong> the author stated clearly the research on public health problems and the objectives.</p><p>&nbsp;<strong>Methods</strong>: The study design was described and appropriate to address the study objectives. Data collection tools were clearly stated, but the author did not describe how knowledge and attitude were calculated. Although the author stated the statistical method used, suppose to include a 95% confidence interval (CI) and cut-off for the p-value.&nbsp;</p><p><strong>Results:</strong> &nbsp;Authors did not include measures of tendency and dispersion and which age group had less knowledge and positive or negative attitudes. Variables associated with knowledge, perception, and attitudes were clearly stated.&nbsp;</p><p><strong>Conclusions:</strong> The conclusion was not based on the result. In the result, the author indicated that COVID-19 knowledge among healthcare workers was adequate, while in the conclusion he stated that the knowledge was inadequate. Also, the author did not conclude on the attitudes and perceptions of the healthcare workers toward COVID-19.</p>