Social & Preventive Medicine In the WHO recommended EPI cluster sampling for assessing primary immunization coverage, the age group of children to be surveyed is A 0-12 months B 6-12 months C 9-12 months D 12-23 months 💡 Explanation In the WHO recommended EPI cluster sampling for assessing primary immunization coverage, the age group of children to be surveyed is ✓ Correct Answer: D. 12-23 months