Isolation and quarantine are which level of prevention?

Isolation and quarantine are which level of prevention??

Isolation and quarantine are among the non-pharmaceutical interventions being used to minimise transmission of COVID-19

In this narrative review, the authors searched for studies of prevention or infection control measures for MERS-CoV

In this series of systematic reviews, the authors searched for studies of the effects of social distancing measures for pandemic influenza, and covered six measures: isolating ill individuals, contact tracing, quarantining exposed individuals, school measures or closures, workplace measures or closures, and crowd avoidance.