Before revision: Zhang et al. (2020) reported that mandating face coverings in public is necessary to decrease the rate of new COVID-19 infections. We present a counterexample that disproves this finding.
After revision: Zhang et al. (2020) reported that mandating face coverings in public is necessary to decrease the rate of new COVID-19 . We show using differential questions from the SIR model and with a counterexample that disproves this finding.