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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.