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Table 1 Laboratory-confirmed influenza cases overall and by type for each country between 2010 and 2017

From: Epidemiology and timing of seasonal influenza epidemics in the Asia-Pacific region, 2010–2017: implications for influenza vaccination programs

Influenza transmission zone/country Influenza cases, N (% of total) n (% of cases) A/B ratio
Any influenza A Any influenza B
Eastern Asia 563,511 (79.2) 381,783 (67.8) 181,728 (32.2) 2.10
 China 473,583 (66.5) 315,130 (66.5) 158,453 (33.5) 1.99
 Japan 69,123 (9.7) 53,819 (77.9) 15,304 (22.1) 3.52
 Mongolia 4055 (0.6) 2727 (67.3) 1328 (32.7) 2.05
 South Korea 16,750 (2.4) 10,107 (60.3) 6643 (39.7) 1.52
Southern Asia 54,400 (7.6) 41,885 (77.0) 12,515 (23.0) 3.35
 Bangladesh 5582 (0.8) 3631 (65.0) 1951 (35.0) 1.86
 India 21,082 (3.0) 18,024 (85.5) 3058 (14.5) 5.89
 Iran 9807 (1.4) 7139 (72.8) 2668 (27.2) 2.68
 Nepal a 7863 (1.1) 5590 (71.1) 2273 (28.9) 2.46
 Pakistan b 2547 (0.4) 1929 (75.7) 618 (24.3) 3.12
 Sri Lanka 7519 (1.1) 5572 (74.1) 1947 (25.9) 2.86
South-East Asia 44,681 (6.3) 28,483 (63.7) 16,198 (36.3) 1.76
 Cambodia 4077 (0.6) 2539 (62.3) 1538 (37.7) 1.65
 Indonesia 7567 (1.1) 4384 (57.9) 3183 (42.1) 1.38
 Laos c 3216 (0.5) 1907 (59.3) 1309 (40.7) 1.46
 Philippines 5451 (0.8) 3013 (55.3) 2438 (44.7) 1.24
 Singapore 10,317 (1.4) 7441 (72.1) 2876 (27.9) 2.59
 Thailand 7860 (1.1) 5190 (66.0) 2670 (34.0) 1.94
 Vietnam 6193 (0.9) 4009 (64.7) 2184 (35.3) 1.84
Oceania-Melanesia-Polynesia 49,142 (6.9) 36,112 (73.5) 13,030 (26.5) 2.77
 Australia 33,393 (4.7) 25,500 (76.4) 7893 (23.6) 3.23
 New-Zealand 15,749 (2.2) 10,612 (67.4) 5137 (32.6) 2.07
Total 711,734 (100.0) 488,263 (68.6) 223,471 (31.4) 2.18
  1. aData were available for 2012–2017
  2. bData were available for 2010–2016
  3. cData were available for 2011–2017