  Pavelka et al. (Science, Reports, 7 May 2021) claim that a single round of
population-wide antigen testing in Slovakia reduced the observed COVID-19
prevalence by 58%, and that it played a substantial role in curbing the
pandemic. We argue that this estimate, which is based on incorrect assumptions,
is exaggerated, and that the relief was short-lived with little effect on
mitigating the pandemic.
