Influenza virus subtyping in 2025
The information is based on testing of influenza virus isolates obtained from cell culture. The date refers to specimen reception by the laboratory.
| Week number | Date | Type A total | Type A subtype H1 | Type A subtype H3 | Type A subtype H5 | Type A subtype H7 | Type A subtype H9 | Type B total | Type B (Victoria lineage) | Type B (Yamagata lineage) |
|---|---|---|---|---|---|---|---|---|---|---|
| 1 | 29/12/2024 - 04/01 | 70 | 63 | 7 | 0 | 0 | 0 | 3 | 3 | 0 |
| 2 | 05/01 - 11/01 | 71 | 56 | 15 | 0 | 0 | 0 | 2 | 2 | 0 |
| 3 | 12/01 - 18/01 | 74 | 67 | 7 | 0 | 0 | 0 | 4 | 4 | 0 |
| 4 | 19/01 - 25/01 | 67 | 53 | 14 | 0 | 0 | 0 | 5 | 5 | 0 |
| 5 | 26/01 - 01/02 | 32 | 29 | 3 | 0 | 0 | 0 | 2 | 2 | 0 |
| 6 | 02/02 - 08/02 | 85 | 78 | 7 | 0 | 0 | 0 | 5 | 5 | 0 |
| 7 | 09/02 - 15/02 | 79 | 72 | 7 | 0 | 0 | 0 | 1 | 1 | 0 |
| 8 | 16/02 - 22/02 | 67 | 58 | 9 | 0 | 0 | 0 | 3 | 3 | 0 |
| 9 | 23/02 - 01/03 | 55 | 52 | 3 | 0 | 0 | 0 | 5 | 5 | 0 |
| 10 | 02/03 - 08/03 | 54 | 52 | 2 | 0 | 0 | 0 | 6 | 6 | 0 |
| 11 | 09/03 - 15/03 | 57 | 54 | 3 | 0 | 0 | 0 | 12 | 12 | 0 |
| 12 | 16/03 - 22/03 | 47 | 38 | 9 | 0 | 0 | 0 | 16 | 16 | 0 |
| 13 | 23/03 - 29/03 | 32 | 31 | 1 | 0 | 0 | 0 | 15 | 15 | 0 |
Remarks:
1. Figures are subject to minor adjustments.
2. Multiple specimens may have been received for testing from the same patient.
3. As a result of disruptions in laboratory testing from early 2020 to early 2023, please interpret the data with caution.
3. As a result of disruptions in laboratory testing from early 2020 to early 2023, please interpret the data with caution.
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