<prompt> Sampling method used in assessing immunization status of children under immunization programme isSystemic sampleingStratified samplingGroup samplingCluster sampling  <response>: Ans. is d i.e., Cluster sampling o In the Expanded programme on Immunization EPI cluster technique, a simplified cluster sampling method is used. It is based on ranodm selection of 210 children who are 12-23 months of age. These patients are selected in 30 clusters of 7 children each to estimate immunization coverage levels. 