This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: None, Subject name: Social & Preventive Medicine
Not a strategy for measles elimination ? 
Select and explain. 
A. Mop up: Vaccinate kids left with routine vaccination, B. Catch up: One time nation wide vaccination 9 month- 14 years old children, C. Keep up: Vaccinate > 95% successive bih, D. Follow up: Nationwide vaccination every 2-4 years
A: Mop up: Vaccinate kids left with routine vaccination
Answer: A: Mop up: Vaccinate kids left with routine vaccination 
Explanation: Ans. is 'a' i.e., Mop up: Vaccinate kids left with routine vaccination The prioies of countries persuing measles control include :- Improve routine vaccination coverage level to at least 90%. Active coverage of more than 90% in catch-up and follow-up campaigns or active coverage of more than 90% with routine second dose of measles vaccine. Establish case - based surveillance with laboratory confirmation of suspected cases and virus isolation from all chains of transmission. Conduct supplementary vaccination campaign together with administration of vitamin 'A' in high risk areas. In India, measles is a major cause of morbidity and a significant contributor to childhood moality. Prior to the immunization programme, cyclical increase in the incidence of measles were recorded every third year. With the increase in immunization coverage levels, the intervals between cyclic peaks has increased and the intensity of the peak minimized. Epidemic of measles occur if propoion of susceptible children is > 40% If measles is introduced in a virgin community, it infects > 90% of children. Eradication of measles requires vaccine coverage >96%