PMC6337055_01
Distribution of reported cases of measles according to the epidemiological week of onset of symptoms and investigation status, Manaus, Amazonas state, Brazil, 6 February-3 November 2018
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The epidemic curve shows a gradual increase in the number of cases with symptom onset from 6 May, reaching a peak of 763 cases in EW 29 (15-21 July), then decreasing gradually (Figure 1).
Spatial distribution of reported cases of measles according to investigation status, Manaus, Amazonas state, Brazil, 6 February-3 November 2018
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All five districts presented confirmed cases, which indicates the circulation of the virus throughout the municipality (Figure 2).
Proportional distribution of reported cases of measles according to age group, stratified by (A) epidemiological week of notification and (B) vaccination statusa, Manaus, Amazonas, Brazil, 6 February-3 November 2018
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Up to week EW 22, most cases were in the age group of 6 months-4 years, from the EW 23 onwards, however, an increase of cases aged 15-29 years was observed (Figure 3A). In addition, the majority of unvaccinated cases were in the age group of 15-29 years (Figure 3B).