go to ORKG: http://orkg.org/orkg/predicate/P177059
prevents Contamination
indicates that a study design or methodological choice reduces the risk of unintended influence between study groups, which could bias the results. In a multicenter cluster-randomized trial, this typically refers to the practice of randomizing entire clusters (such as clinics or hospitals) rather than individuals, thereby preventing the control group from being exposed to elements of the intervention