TABLE 2.
Proportion of influenza subtypes and lineages among positive specimens a , Lao PDR 2016–2023.
|
A/pdmH1N1 n (%) |
A/H3 n (%) |
B Victoria n (%) |
B Yamagata n (%) |
|
|---|---|---|---|---|
| Overall | 1429 (34.9) | 1325 (32.3) | 1037 (25.3) | 284 (6.9) |
| Surveillance type | ||||
| ILI | 946 (34.3) | 881 (31.9) | 716 (25.9) | 204 (7.4) |
| SARI | 483 (36.2) | 444 (33.3) | 321 (24.0) | 80 (6.0) |
| Year | ||||
| 2016 | 168 (28.3) | 91 (15.3) | 304 (51.2) | 25 (4.2) |
| 2017 | 74 (10.7) | 389 (56.2) | 96 (13.9) | 131 (18.9) |
| 2018 | 458 (77.0) | 10 (1.7) | 0 (0.0) | 126 (21.2) |
| 2019 | 110 (23.1) | 139 (29.2) | 217 (45.6) | 2 (0.4) |
| 2020 | 59 (24.7) | 149 (62.3) | 28 (11.7) | 0 (0.0) |
| 2021 | 0 (0.0) | 106 (99.1) | 0 (0.0) | 0 (0.0) |
| 2022 | 2 (0.3) | 313 (51.6) | 292 (48.1) | 0 (0.0) |
| 2023 | 558 (71.0) | 128 (16.3) | 100 (12.7) | 0 (0.0) |
| Region | ||||
| North | 596 (33.2) | 601 (33.5) | 472 (26.3) | 118 (6.6) |
| Central | 192 (27.9) | 266 (38.7) | 166 (24.1) | 61 (8.9) |
| South | 641 (39.7) | 458 (28.4) | 399 (24.7) | 105 (6.5) |
| Sex | ||||
| Male | 710 (34.8) | 680 (33.3) | 510 (25.0) | 134 (6.6) |
| Female | 719 (35.0) | 645 (31.4) | 527 (25.7) | 150 (7.3) |
| Age (years) | ||||
| 0–1 | 251 (35.4) | 240 (33.9) | 180 (25.4) | 35 (4.9) |
| 2–4 | 307 (41.5) | 224 (30.3) | 164 (22.2) | 37 (5.0) |
| 5–14 | 384 (35.2) | 294 (26.9) | 314 (28.8) | 95 (8.7) |
| 15–49 | 359 (30.5) | 412 (35.0) | 326 (27.7) | 75 (6.4) |
| 50–64 | 89 (39.9) | 83 (37.2) | 25 (11.2) | 26 (11.7) |
| ≥ 65 | 39 (25.2) | 72 (46.5) | 28 (18.1) | 16 (10.3) |
Abbreviations: ILI, influenza‐like illness; PDR, People's Democratic Republic; SARI, severe acute respiratory illness.
a
Not shown are influenza A untypable (n = 3), influenza A/H1 N untypable (n = 1), influenza A/H5 (n = 2), and influenza B uncharacterized (n = 15).