Table 3 Circulation of influenza strains by region and season and attack rates
Subtype/ lineage | Confirmed influenza episodes, n (%) | ||||||
|---|---|---|---|---|---|---|---|
South Africa 2014 | Philippines 2014 | Philippines 2015 | European countries a 2014/2015 | European countries a 2015/2016 | Total | ||
N = 17 | N = 93 | N = 45 | N = 37 | N = 71 | N = 263 | Attack rate b, % (95% CI) | |
A(H1N1) | 0 (0.0) | 0 (0.0) | 2 (4.4) | 2 (5.4) | 45 (63.4) | 49 (18.6) | 2.2 (1.6; 2.8) |
A(H3N2) | 16 (94.1) | 23 (24.7) | 43 (95.6) | 24 (64.9) | 1 (1.4) | 107c (40.7) | 4.6 (3.7; 5.5) |
B/Yamagata | 1 (5.9) | 53 (57.0) | 0 (0.0) | 8 (21.6) | 0 (0.0) | 62 (23.6) | 2.8 (2.1; 3.5) |
B/Victoria | 0 (0.0) | 0 (0.0) | 0 (0.0) | 0 (0.0) | 21 (26.9) | 21 (8.0) | 1.0 (0.5; 1.4) |
Not subtyped | 0 (0.0) | 17 (18.3) | 0 (0.0) | 3 (8.1) | 4 (5.6) | 24 (9.1) | 1.1 (0.7; 1.5) |