Table 2.
Symptomatology, mortality rate and hospitalisation by influenza strain
| Symptom | Total n (%) | Negatives n (%) | Positives n (%) | A N/S n (%) | Seasonal A/H1N1 n (%) | A/ H1N1pdm09 n (%) | Seasonal A/H3N2 n (%) | Inf B n (%) |
|---|---|---|---|---|---|---|---|---|
| Fever | 40 031 (72.4) | 24 478 (68.8) | 15 553 (78.8) | 1772 (81.8) | 931 (71.0) | 7600 (79.1) | 3296 (79.2) | 1954 (78.7) |
| Cough | 50 275 (90.9) | 32 006 (89.9) | 18 269 (92.6) | 1923 (88.8) | 1211 (92.3) | 8901 (92.7) | 3890 (93.5) | 2344 (94.4) |
| Headache | 40 075 (72.4) | 23 858 (67.0) | 16 217 (82.2) | 1722 (79.5) | 1027 (78.3) | 7873 (82.0) | 3477 (83.6) | 2118 (85.3) |
| Odynophagia | 28 210 (51.0) | 16 845 (47.3) | 11 365 (57.6) | 1268 (58.5) | 821 (62.6) | 5407 (56.3) | 2388 (57.4) | 1481 (59.6) |
| Myalgias | 34 483 (62.3) | 20 099 (56.5) | 14 384 (72.9) | 1503 (69.4) | 900 (68.6) | 7054 (73.4) | 3075 (73.9) | 1852 (74.6) |
| Arthralgias | 31 310 (56.6) | 18 308 (51.4) | 13 002 (65.9) | 1396 (64.5) | 845 (64.4) | 6413 (66.8) | 2721 (65.4) | 1627 (65.5) |
| Prostration | 27 342 (49.4) | 18 137 (51.0) | 9205 (46.7) | 1031 (47.6) | 537 (40.9) | 4666 (48.6) | 1868 (44.9) | 1103 (44.4) |
| Rhinorrhoea | 36 238 (65.5) | 21 616 (60.7) | 14 622 (74.1) | 1699 (78.4) | 1089 (83.0) | 6785 (70.6) | 3136 (75.4) | 1913 (77.0) |
| Chills | 32 650 (59.0) | 19 399 (54.5) | 13 251 (67.2) | 1387 (64.0) | 844 (64.3) | 6525 (67.9) | 2835 (68.2) | 1660 (66.9) |
| Abdominal pain | 13 884 (25.1) | 8399 (23.6) | 5485 (27.8) | 622 (28.7) | 432 (32.9) | 2676 (27.9) | 1073 (25.8) | 682 (27.5) |
| Conjunctivitis | 13 122 (23.7) | 7474 (21.0) | 5648 (28.6) | 649 (30.0) | 419 (31.9) | 2628 (27.4) | 1220 (29.3) | 732 (29.5) |
| Dyspnoea | 33 842 (61.2) | 24 175 (67.9) | 9667 (49.0) | 800 (36.9) | 497 (37.9) | 5101 (53.1) | 2070 (49.8) | 1199 (48.3) |
| Cyanosis | 5773 (10.4) | 4294 (12.1) | 1479 (7.5) | 113 (5.2) | 75 (5.7) | 830 (8.6) | 303 (7.3) | 158 (6.4) |
| Diarrhoea | 6681 (12.1) | 4307 (12.1) | 2374 (12.0) | 272 (12.6) | 145 (11.1) | 1203 (12.5) | 427 (10.3) | 327 (13.2) |
| Thoracic pain | 25 897 (46.8) | 16 890 (47.5) | 9007 (45.7) | 819 (37.8) | 497 (36.5) | 4742 (49.4) | 1881 (45.2) | 1086 (43.7) |
| Polypnoea | 5773 (10.4) | 4294 (12.1) | 1479 (7.5) | 113 (5.2) | 75 (5.7) | 830 (8.6) | 303 (7.3) | 158 (6.4) |
| Irritability | 8135 (14.7) | 6292 (17.7) | 1843 (9.3) | 237 (10.9) | 178 (13.6) | 845 (8.8) | 353 (8.5) | 230 (9.3) |
| Coryza | 8100 (14.6) | 4916 (13.8) | 3184 (16.1) | 260 (12.0) | 212 (16.2) | 1551 (16.1) | 700 (16.8) | 461 (18.6) |
| Average number of symptoms | 7.99 | 7.75 | 8.34 | 8.12 | 8.17 | 8.50 | 8.42 | 8.49 |
| Hospitalised cases | 35 643 (64.4) | 26 252 (73.8) | 9391 (47.6) | 743 (34.3) | 373 (28.4) | 5179 (53.9) | 1952 (46.9) | 1144 (46.1) |
| Deaths | 3588 (6.5) | 2317 (6.5) | 1271 (6.4) | 65 (3.0) | 39 (3.0) | 952 (9.9) | 136 (3.3) | 79 (3.2) |