Zhang et al. (2020) used linear regression to quantify the effect of lockdowns on the number of cases of COVID-19. We show using differential equations from the SIR model and with an example from another location their analysis did not include that their analysis should not be considered sound evidence  .
Zhang et al. (2020) used linear regression to quantify the effect of lockdowns on the number of cases of COVID-19. We show using differential equations from the susceptible-exposed-infected-recovered (SEIR) model and with an example from another location not previously considered that the Zhang et al. analysis should not be considered sound evidence that mask mandates are sufficient to control or the primary factor controlling the spread of COVID-19 .
R
SIR
susceptible-exposed-infected-recovered (SEIR)
R
their analysis did not include that their
not previously considered that the Zhang et al.
A
that mask mandates are sufficient to control or the primary factor controlling the spread of COVID-19