Covid-19 is an alarming issue for the whole world.It's origin, spread and the growth are not very well known.It's a commendable job from your side in this field.

Authors need to give the whole body of paper in a systematic way to be understood easily by research workers.The tables and graphs need to be more transparent.

Your study reflects the rigorous studies and comparisons of various data collected so far.Only a few revisions should be made to be acceptable to journal point of view.

Strengths

• Unique piece of work.The reasearch paper deals with the most important and disturbing situation of the world i.e. outbreak of covid-19.

• Accurately identified main objective.Comparative studies and methods discussed are well defined as needed.

• Up to date.This paper signifies the main objective and leaves ample scope of future studies on covid-19 to help the new researches.

Only points of revisions

• Tables and graphs plotted should be of high quality.

• The paragraphs in the whole paper are not in a specific way.They are rather in a haphazard kind of paragraphs.So, they should be in a systematic way.

• Try to get more recent informations on spread of covid-19 in countries like India, middle East and study the characteristics of covid-19 in those countries as well.