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Detection of influenza viruses in respiratory specimens in 2019

Detection of influenza viruses in respiratory specimens in 2019

Week
number

Date

No. of specimen tested

Type A subtype H1

Type A subtype H3

Type A subtype H5

Type A subtype H7

Type A subtype H9

Type B

Type C

No.

%

No.

%

No.

%

No.

%

No.

%

No.

%

No.

%
1 30/12/2018 - 05/01 6055 1018 16.81 177 2.92 0 0.00 0 0.00 0 0.00 5 0.08 10 0.17
2 06/01 - 12/01 7326 1575 21.50 254 3.47 0 0.00 0 0.00 0 0.00 15 0.20 9 0.12
3 13/01 - 19/01 7707 1999 25.94 287 3.72 0 0.00 0 0.00 0 0.00 22 0.29 12 0.16
4 20/01 - 26/01 7826 1714 21.90 301 3.85 0 0.00 0 0.00 0 0.00 8 0.10 3 0.04
5 27/01 - 02/02 7095 1158 16.32 259 3.65 0 0.00 0 0.00 0 0.00 23 0.32 4 0.06
6 03/02 - 09/02 6073 793 13.06 206 3.39 0 0.00 0 0.00 0 0.00 12 0.20 5 0.08
7 10/02 - 16/02 6374 773 12.13 223 3.50 0 0.00 0 0.00 0 0.00 16 0.25 4 0.06
8 17/02 - 23/02 6243 592 9.48 245 3.92 0 0.00 0 0.00 0 0.00 24 0.38 7 0.11
9 24/02 - 02/03 6164 508 8.24 289 4.69 0 0.00 0 0.00 0 0.00 25 0.41 6 0.10
10 03/03 - 09/03 5973 473 7.92 241 4.03 0 0.00 0 0.00 0 0.00 33 0.55 4 0.07
11 10/03 - 16/03 5964 368 6.17 304 5.10 0 0.00 0 0.00 0 0.00 37 0.62 10 0.17
12 17/03 - 23/03 6475 308 4.76 240 3.71 0 0.00 0 0.00 0 0.00 48 0.74 4 0.06
13 24/03 - 30/03 6117 225 3.68 221 3.61 0 0.00 0 0.00 0 0.00 51 0.83 2 0.03
14 31/03 - 06/04 5410 131 2.42 164 3.03 0 0.00 0 0.00 0 0.00 49 0.91 1 0.02
15 07/04 - 13/04 6209 68 1.10 154 2.48 0 0.00 0 0.00 0 0.00 78 1.26 2 0.03
16 14/04 - 20/04 4306 48 1.11 76 1.76 0 0.00 0 0.00 0 0.00 65 1.51 7 0.16
17 21/04 - 27/04 6579 76 1.16 175 2.66 0 0.00 0 0.00 0 0.00 146 2.22 6 0.09
18 28/04 - 04/05 5439 63 1.16 105 1.93 0 0.00 0 0.00 0 0.00 157 2.89 1 0.02
19 05/05 - 11/05 5433 46 0.85 82 1.51 0 0.00 0 0.00 0 0.00 141 2.60 6 0.11
20 12/05 - 18/05 5508 42 0.76 83 1.51 0 0.00 0 0.00 0 0.00 233 4.23 3 0.05
21 19/05 - 25/05 5585 44 0.79 101 1.81 0 0.00 0 0.00 0 0.00 244 4.37 5 0.09
22 26/05 - 01/06 5059 30 0.59 78 1.54 0 0.00 0 0.00 0 0.00 224 4.43 9 0.18
23 02/06 - 08/06 4818 30 0.62 92 1.91 0 0.00 0 0.00 0 0.00 191 3.96 4 0.08
24 09/06 - 15/06 5527 71 1.28 137 2.48 0 0.00 0 0.00 0 0.00 214 3.87 5 0.09
25 16/06 - 22/06 5401 99 1.83 123 2.28 0 0.00 0 0.00 0 0.00 198 3.67 2 0.04
26 23/06 - 29/06 5262 119 2.26 125 2.38 0 0.00 0 0.00 0 0.00 173 3.29 7 0.13
27 30/06 - 06/07 4800 150 3.13 137 2.85 0 0.00 0 0.00 0 0.00 184 3.83 5 0.10
28 07/07 - 13/07 5033 170 3.38 133 2.64 0 0.00 0 0.00 0 0.00 159 3.16 7 0.14
29 14/07 - 20/07 5210 161 3.09 114 2.19 0 0.00 0 0.00 0 0.00 135 2.59 5 0.10
30 21/07 - 27/07 4746 123 2.59 118 2.49 0 0.00 0 0.00 0 0.00 95 2.00 5 0.11
31 28/07 - 03/08 4508 64 1.42 114 2.53 0 0.00 0 0.00 0 0.00 62 1.38 5 0.11
32 04/08 - 10/08 4721 44 0.93 113 2.39 0 0.00 0 0.00 0 0.00 50 1.06 5 0.11
33 11/08 - 17/08 4686 46 0.98 76 1.62 0 0.00 0 0.00 0 0.00 32 0.68 2 0.04
34 18/08 - 24/08 4462 42 0.94 66 1.48 0 0.00 0 0.00 0 0.00 29 0.65 6 0.13
35 25/08 - 31/08 4370 51 1.17 61 1.40 0 0.00 0 0.00 0 0.00 16 0.37 2 0.05
36 01/09 - 07/09 4297 55 1.28 69 1.61 0 0.00 0 0.00 0 0.00 17 0.40 2 0.05
37 08/09 - 14/09 4127 47 1.14 76 1.84 0 0.00 0 0.00 0 0.00 10 0.24 3 0.07
38 15/09 - 21/09 5345 56 1.05 80 1.50 0 0.00 0 0.00 0 0.00 17 0.32 2 0.04
39 22/09 - 28/09 4904 25 0.51 49 1.00 0 0.00 0 0.00 0 0.00 22 0.45 1 0.02
40 29/09 - 05/10 4798 41 0.85 42 0.88 0 0.00 0 0.00 0 0.00 16 0.33 2 0.04
41 06/10 - 12/10 4317 28 0.65 27 0.63 0 0.00 0 0.00 0 0.00 6 0.14 0 0.00
42 13/10 - 19/10 4294 39 0.91 19 0.44 0 0.00 0 0.00 0 0.00 4 0.09 1 0.02
43 20/10 - 26/10 4743 55 1.16 20 0.42 0 0.00 0 0.00 0 0.00 9 0.19 1 0.02
44 27/10 - 02/11 4676 42 0.90 17 0.36 0 0.00 0 0.00 0 0.00 17 0.36 7 0.15
45 03/11 - 09/11 4784 51 1.07 14 0.29 0 0.00 0 0.00 0 0.00 8 0.17 12 0.25
46 10/11 - 16/11 4740 57 1.20 18 0.38 0 0.00 0 0.00 0 0.00 2 0.04 10 0.21
47 17/11 - 23/11 4781 63 1.32 9 0.19 0 0.00 0 0.00 0 0.00 3 0.06 10 0.21
48 24/11 - 30/11 4794 67 1.40 9 0.19 0 0.00 0 0.00 0 0.00 2 0.04 8 0.17
49 01/12 - 07/12 4799 83 1.73 27 0.56 0 0.00 0 0.00 0 0.00 3 0.06 3 0.06
50 08/12 - 14/12 5725 102 1.78 65 1.14 0 0.00 0 0.00 0 0.00 15 0.26 17 0.30
51 15/12 - 21/12 5974 160 2.68 99 1.66 0 0.00 0 0.00 0 0.00 17 0.28 18 0.30
52 22/12 - 28/12 5366 231 4.30 102 1.90 0 0.00 0 0.00 0 0.00 13 0.24 21 0.39
 
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.