Coronavirus disease 2019 (COVID-19) is an emerging infectious disease that was first reported in Wuhan, China, and which has subsequently spread worldwide [1]. Zhang and colleagues reported in Critical Care, providing evidence that asymptomatic carriers can transmit COVID-19 [2]. To our knowledge, no study comprehensively investigated the duration of severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) viral RNA in asymptomatic carriers.