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Table 1 Influenza activity (positivity, circulating types and subtypes) among patients seen as outpatients and presenting with ILI 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 (%)c N (%)c N (%)c N (%)c
All cases 3369 3323 (99) 891 (27) 579 (65) 264 (30) 315 (35) 312 (35)
Year
 2009 64 40 (63) 8 (20) 6 (75) 2 (25) 4 (50) 2 (25)
 2010 80 80 (100) 4 (5) 4 (100) 4 (100) 0 (0) 0 (0)
 2011 61 61 (100) 19 (31) 8 (42) 2 (11) 6 (32) 11 (58)
 2012 797 792 (99) 211 (27) 174 (82) 160 (76) 14 (7) 37 (18)
 2013 1047 1043 (100) 347 (33) 214 (62) 22 (6) 192 (55) 133 (38)
 2014 797 792 (99) 228 (29) 132 (58) 41 (18) 91 (40) 96 (42)
 2015 523 515 (98) 74 (14) 41 (55) 33 (45) 8 (11) 33 (45)
Age
  < 2 191 186 (97) 23 (12) 18 (78) 10 (43) 8 (35) 5 (22)
 2–4 228 222 (97) 41 (18) 26 (63) 16 (39) 10 (24) 15 (37)
 5–14 1013 997 (98) 331 (33) 198 (60) 84 (25) 114 (34) 133 (40)
 15–49 1720 1705 (99) 453 (27) 312 (69) 147 (32) 165 (36) 141 (31)
 50–64 153 149 (97) 34 (23) 20 (59) 6 (18) 14 (41) 14 (41)
  > =65 48 48 (100) 9 (19) 5 (56) 1 (11) 4 (44) 4 (44)
 Missed 16 16 (100) 0 (0) 0 (0) 0 (0) 0 (0) 0 (0)
Sex
 Female 2025 1993 (98) 521 (26) 325 (62) 147 (28) 178 (34) 196 (38)
 Male 1344 1330 (99) 370 (28) 254 (69) 117 (32) 137 (37) 116 (31)
Site
 Akaki HC 244 242 (99) 53 (22) 30 (57) 18 (34) 12 (23) 23 (43)
 Kolfe HC 1366 1360 (100) 344 (25) 216 (63) 103 (30) 113 (33) 128 (37)
 Shiromeda HC 1759 1721 (98) 494 (29) 333 (67) 143 (29) 190 (38) 161 (33)
  1. aDenominator is the number who were sampled
  2. bDenominator is the number who were tested
  3. cDenominator is the number who tested positive