Abstract:
:To quantify age-specific excess-mortality rates and transmissibility patterns for the 1918-20 influenza pandemic in Boyacá, Colombia, we reviewed archival mortality records. We identified a severe pandemic wave during October 1918-January1919 associated with 40 excess deaths per 10,000 population. The age profile for excess deaths was W shaped; highest mortality rates were among infants (<5 y of age), followed by elderly persons (>60 y) and young adults (25-29 y). Mean reproduction number was estimated at 1.4-1.7, assuming 3- or 4-day generation intervals. Boyacá, unlike cities in Europe, the United States, or Mexico, experienced neither a herald pandemic wave of deaths early in 1918 nor a recrudescent wave in 1920. In agreement with reports from Mexico, our study found no death-sparing effect for elderly persons in Colombia. We found regional disparities in prior immunity and timing of introduction of the 1918 pandemic virus across populations.
journal_name
Emerg Infect Disjournal_title
Emerging infectious diseasesauthors
Chowell G,Viboud C,Simonsen L,Miller MA,Acuna-Soto R,Díaz JM,Martínez-Martín AFdoi
10.3201/eid1801.101969subject
Has Abstractpub_date
2012-01-01 00:00:00pages
48-56issue
1eissn
1080-6040issn
1080-6059journal_volume
18pub_type
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