Comment to the paper Assessing nitrogen dioxide (NO2) levels as a contributing factor to coronavirus (COVID-19) fatality, by Ogen 2020

In this paper we critically review the work �Assessing nitrogen dioxide (NO2) levels as a contributing factor to coronavirus (COVID-19) fatality� (Ogen, 2020), stressing the fact that we think there are flaws in the published methodology We do this as we think it is important, given the current deluge of �COVID related� publications, to clearly define what can be stated and what on the contrary, cannot be stated, due to limitations in terms of data quality and/or methodology