As the measles vaccination in 9 - 59 months old dropped from 81.63% in 2007 to 52.17% in 2011, the confirmed cases of measles/1,000,000 population increased from 0.68 to 16.81. Furthermore, the number of measles outbreak increased from 0 in 2007 to 5 in 2010 as the proportion of the population immunized dropped (Table 1).
On average, between 2007 and 2011, 34% of cases with febrile rash living in urban areas were unimmunized while 41% of those living in rural areas were unimmunized. In 2007, 25% of febrile rash cases living in urban areas and 16% of those living in rural areas were unimmunized while in 2011, 49% of those living in urban areas and 60% of those living in rural areas were not immunized (Table 1).
Over the five years under review, for cases with confirmed cases of measles, 61.33% of them were unimmunized while 87% of the confirmed cases of measles occurred during the dry season (Table 2). The peak of measles infection occurred in January and February which accounted for 55% of all cases (Table 3).