Detection of influenza viruses in respiratory specimens in 2026

Week number	Date	No. of specimen tested	Type A								Type B			Type C
Week number	Date	No. of specimen tested	Positive	%	Subtyping performed	H1	H3	H5	H7	H9	Positive	%	Lineage determination performed*	No.	%
1	28/12/2025 - 03/01	8281	277	3.35	261	12	249	0	0	0	8	0.10	7	2	0.02
2	04/01 - 10/01	7937	260	3.28	249	6	243	0	0	0	6	0.08	5	3	0.04
3	11/01 - 17/01	9044	354	3.91	339	31	308	0	0	0	12	0.13	12	4	0.04
4	18/01 - 24/01	8784	329	3.75	312	20	292	0	0	0	11	0.13	11	7	0.08
5	25/01 - 31/01	8677	264	3.04	254	9	245	0	0	0	9	0.10	9	7	0.08
6	01/02 - 07/02	8316	163	1.96	163	14	149	0	0	0	20	0.25	20	4	0.05
7	08/02 - 14/02	8126	123	1.51	122	15	107	0	0	0	25	0.31	0	4	0.05

* All belonged to B/Victoria lineage.

Remarks:

1. For specimens received from 10 February 2014 onwards, molecular testing has replaced viral culture. Please interpret the data and trends in light of the enhanced sensitivity of molecular testing, and hence positive detection rates.

2. Figures are subject to minor adjustments.

3. Multiple specimens may have been received for testing from the same patient.
4. As a result of disruptions in laboratory testing from early 2020 to early 2023, please interpret the data with caution.