Re: Subramanian and Kumar. Vaccination rates and COVID-19 cases.

<p>The manuscript from Subramanian and Kumar shows a lack of vaccine efficacy on Covid Incidence. However, this paper suffers major pitfalls : inadequate outcome, lack of confounding factors, inadequate time period (7 days), inclusion/exclusion criteria not respected, causal inference from inappropriate data, and erroneous interpretation of the data. We comment on these issues in detail and show that Subramanian and Kumar’s paper is flawed and misleading.</p>