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Table 1 Basic profiles of five evacuation centres and influenza cases, Yamamoto town

From: Investigation of an Influenza A (H3N2) outbreak in evacuation centres following the Great East Japan earthquake, 2011

Evacuation centres No. of evacuees* % of ≤ 15 years in evacuees % of ≥ 65 years in evacuees No. of influenza case M/F ratio Index case (age, sex) Mean age of influenza cases AR** (%)
Evacuation centre A 130 NA NA 10 4/6 60s, M 54.4 7.7
Evacuation centre B 702 12.1 36.3 60 27/33 48, M 51.0 8.6
Evacuation centre C 606 10.1 28.7 31 16/15 54, M 50.7 5.1
Evacuation centre D 121 NA NA 2 0/2 46, F 31.5 1.7
Evacuation centre E 251 NA NA 2 2/0 10s, M 21.5 0.8
  1. Note: *The numbers of evacuees in Evacuation Centre A, D, and E were reported on March 25, 2011. The number of evacuees in Evacuation Centre B and C were reported on March 21, 2011. **AR, attack rate.
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