The Regional strategy for measles control recommends that a second opportunity for measles immunization be provided to all children irrespective of their vaccination status or history of clinical measles. The preferred method of provision of a second opportunity is through Supplemental Immunization ...Activities (SIAs) targeting children 9 months to 14 years in catch-up campaigns and 9 months to 4 or 5 years during periodic follow-up campaigns
more