Data from the latest consolidated IMD surveillance reports were used [40, 41]. It was decided not to use the surveillance data from 2018 because they are not consolidated yet. Data on notified cases of IMD for 2011-2017 are originally disaggregated in different reports. The data were reorganized and grouped to be analysed and critically interpreted. Based on data availability, stratifications by age group (0-12 months, 1-4, 5-9, 10-14, 15-24, 25-64, > 64 years) and serogroup were carried out. Microsoft Excel 2013 was used for trend analysis.
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