Social & Preventive Medicine The mass treatment of trachoma is undeaken if the prevalence of severe or moderate trachoma, in children under 10 years, is more than: September 2012 A 3% B 10% C 5% D 6% 💡 Explanation The mass treatment of trachoma is undeaken if the prevalence of severe or moderate trachoma, in children under 10 years, is more than: September 2012 ✓ Correct Answer: C. 5%