Does [ Application of cluster randomization method on typhoid Vi vaccine trail ]?
Confounding factors can be better controlled between study group and the control group by applying cluster-randomized method on vaccine trail which enabled the intervention to be more scientifically evaluated; The implementation of cluster randomization trial was simple and easy to be accepted.
The time-varying estimates may have implications for the length and intensity of ACT enrollment. However, the optimum time for receipt of ACT services needs to be considered in the context of outcomes other than hospitalization alone.