Background: With the ongoing outbreak of COVID-19 around the world, it has become a worldwide health concern. Aim of study: check a cluster or presence of asymptomatic carrier with an asymptomatic transmission of COVID-19. Material m during Conclusions Infectivity of some asymptomatic SARS-CoV-2 carriers might be weak. Effective prevention and control measures are helpful to prevent COVID-19 spread of asymptomatic carriers. The result of this study may alleviate parts of the public concern about asymptomatic infected people further longitudinal surveillance of these asymptomatic cases via virus nucleic acid testing are warranted.