Age-specific measles mortality during the late 19th–early 20th centuries

Tuesday, 10th of November 2015 Print

 

Measles mortality fell prior to the introduction of vaccines or antibiotics. By examining historical mortality reports we sought to determine how much measles mortality was due to epidemiological factors such as isolation from major population centres or increased age at time of infection. Age-specific records were available from Aberdeen Scotland New Zealand and the states of Australia at the end of the 19th and beginning of the 20th centuries. Despite the relative isolation of Australia measles mortality was concentrated in very young children similar to Aberdeen. In the more isolated states of Tasmania Western Australia and Queensland adults made up 14–15% of measles deaths as opposed to 8–9% in Victoria South Australia and New South Wales. Mortality in Iceland and Faroe Islands during the 1846 measles epidemic was used as an example of islands isolated from respiratory pathogens. The transition from crisis mortality across all ages to deaths concentrated in young children occurred prior to the earliest age-specific mortality data collected. Factors in addition to adult age of infection and epidemiological isolation such as nutritional status and viral virulence may have contributed to measles mortality outcomes a century ago.

web link: http://www.ncbi.nlm.nih.gov/pubmed/25865777

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