  In a recent paper (arXiv:2003.12055), Singh and Adhikari present results of
an analysis of a mathematical model of epidemiology based on which they argue
that a $49$ day lockdown is required in India for containing the pandemic in
India. We assert that as a model study with the stated assumptions, the
analysis presented in the paper is perfectly valid, however, any serious
comparison with real data and attempts at prediction from the model are highly
problematic. The main point of the present paper is to convincingly establish
this assertion while providing a warning that the results and analysis of such
mathematical models should not be taken at face value and need to be used with
great caution by policy makers.
