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Table 3 Influenza activity (positivity, circulating types and subtypes) among patients sampled during outbreak investigations in Ethiopia, 2009–2015

From: Epidemiology of influenza in Ethiopia: findings from influenza sentinel surveillance and respiratory infection outbreak investigations, 2009–2015

Characteristic Samples Collected Samples Tested Influenza Positive Influenza types and subtypes
A A(H1N1) pdm2009 A(H3N2) B
N N (%)a N (%)b N (%) N (%)c N (%)c N (%)c
All cases 212 208 (98) 58 (28) 56 (97) 46 (79) 10 (17) 2 (3)
Year
 2009 123 121 (98) 28 (23) 27 (96) 19 (68) 8 (29) 1 (4)
 2010 82 81 (99)) 29 (36) 28 (97) 27 (93) 1 (3) 1 (3)
 2011 2 2 (100) 1 (50) 1 (100) 0 (0) 1 (100) 0 (0)
 2012 5 4 (80) 0 (0) 0 (0) 0 (0) 0 (0) 0 (0)
 2013
 2014
 2015
Age
  < 2 8 6 (75) 0 (0) 0 (0) 0 (0) 0 (0) 0 (0)
 2–4 5 5 (100) 1 (20) 1 (100) 1 (100) 0 (0) 0 (0)
 5–14 25 25 (100) 7 (28) 7 (100) 7 (100) 0 (0) 0 (0)
 15–49 150 149 (99) 47 (32) 45 (96) 35 (74) 10 (21) 2 (4)
 50–64 15 14 (93) 2 (14) 2 (100) 2 (100) 0 (0) 0 (0)
  > =65 4 4 (100) 1 (25) 1 (100) 1 (100) 0 (0) 0 (0)
 Missed 5 5 (100) 0 (0) 0 (0) 0 (0) 0 (0) 0 (0)
Sex
 Female 109 107 (98) 30 (28) 30 (100) 26 (87) 4 (13) 0 (0)
 Male 103 101 (98) 28 (28) 26 (93) 20 (71) 6 (22) 2 (7)
Site
 Nedjo 5 4 (80) 0 (0) 0 (0) 0 (0) 0 (0) 0 (0)
 Arsi 4 4 (100) 0 (0) 0 (0) 0 (0) 0 (0) 0 (0)
 AU 3 2 (67) 0 (0) 0 (0) 0 (0) 0 (0) 0 (0)
 Bole Air Port 3 3 (100) 0 (0) 0 (0) 0 (0) 0 (0) 0 (0)
 ECA 72 71 (99) 15 (21) 14 (93) 11 (73) 3 (20) 1 (7)
 Gonder 24 24 (100) 8 (33) 8 (100) 8 (100) 0 (0) 0 (0)
 Metu 22 21 (95) 16 (76) 16 (100) 16 (100) 0 (0) 0 (0)
 St. Paul 29 29 (100) 6 (21) 6 (100) 5 (83) 1 (17) 0 (0)
 St. Peter 50 50 (100) 13 (26) 12 (92) 6 (46) 6 (46) 1 (8)
  1. aDenominator is the number who were sampled
  2. bDenominator is the number who were tested
  3. cDenominator is the number who tested positive