Detection of parainfluenza viruses in respiratory specimens in 2020

Week number	Date	Age	No. of specimen tested	Parainfluenza 1		Parainfluenza 2		Parainfluenza 3		Parainfluenza 4
Week number	Date	Age	No. of specimen tested	No.	%	No.	%	No.	%	No.	%
1	29/12/2019 - 04/01	All ages	5711	70	1.23	61	1.07	51	0.89	62	1.09
2	05/01 - 11/01	All ages	6893	94	1.36	72	1.04	70	1.02	72	1.04
3	12/01 - 18/01	All ages	6342	120	1.89	65	1.02	71	1.12	100	1.58
4	19/01 - 25/01	All ages	6294	107	1.70	55	0.87	88	1.40	92	1.46
5	26/01 - 01/02	All ages	7076	127	1.79	55	0.78	72	1.02	81	1.14
6	02/02 - 08/02	All ages	5650	74	1.31	57	1.01	45	0.80	69	1.22
7	09/02 - 15/02	All ages	4965	51	1.03	35	0.70	41	0.83	42	0.85
8	16/02 - 22/02	<18	299	8	2.68	4	1.34	7	2.34	11	3.68
9	23/02 - 29/02	<18	318	10	3.14	10	3.14	5	1.57	7	2.20
10	01/03 - 07/03	<18	279	3	1.08	4	1.43	3	1.08	3	1.08
11	08/03 - 14/03	<18	321	4	1.25	6	1.87	8	2.49	6	1.87
12	15/03 - 21/03	<18	424	6	1.42	4	0.94	4	0.94	9	2.12
13	22/03 - 28/03	<18	359	0	0.00	6	1.67	9	2.51	7	1.95
14	29/03 - 04/04	<18	243	1	0.41	0	0.00	2	0.82	3	1.23
15	05/04 - 11/04	<18	227	0	0.00	3	1.32	6	2.64	4	1.76
16	12/04 - 18/04	<18	236	0	0.00	4	1.69	4	1.69	3	1.27
17	19/04 - 25/04	<18	243	0	0.00	1	0.41	4	1.65	4	1.65
18	26/04 - 02/05	<18	278	0	0.00	2	0.72	3	1.08	2	0.72
19	03/05 - 09/05	<18	241	4	1.66	1	0.41	1	0.41	1	0.41
20	10/05 - 16/05	<18	316	1	0.32	1	0.32	1	0.32	4	1.27
21	17/05 - 23/05	<18	319	1	0.31	2	0.63	6	1.88	3	0.94
22	24/05 - 30/05	<18	292	2	0.68	1	0.34	0	0.00	4	1.37
23	31/05 - 06/06	<18	345	1	0.29	3	0.87	3	0.87	1	0.29
24	07/06 - 13/06	<18	341	2	0.59	1	0.29	1	0.29	3	0.88
25	14/06 - 20/06	<18	341	1	0.29	3	0.88	4	1.17	5	1.47
26	21/06 - 27/06	<18	342	2	0.58	1	0.29	4	1.17	3	0.88
27	28/06 - 04/07	<18	323	0	0.00	1	0.31	1	0.31	4	1.24
28	05/07 - 11/07	<18	380	1	0.26	2	0.53	4	1.05	3	0.79
29	12/07 - 18/07	<18	369	1	0.27	2	0.54	2	0.54	3	0.81
30	19/07 - 25/07	<18	309	1	0.32	1	0.32	0	0.00	1	0.32
31	26/07 - 01/08	<18	297	1	0.34	0	0.00	1	0.34	1	0.34
32	02/08 - 08/08	<18	259	2	0.77	2	0.77	1	0.39	0	0.00
33	09/08 - 15/08	<18	269	0	0.00	0	0.00	1	0.37	0	0.00
34	16/08 - 22/08	<18	269	3	1.12	1	0.37	5	1.86	3	1.12
35	23/08 - 29/08	<18	294	1	0.34	1	0.34	3	1.02	3	1.02
36	30/08 - 05/09	<18	258	0	0.00	0	0.00	0	0.00	2	0.78
37	06/09 - 12/09	<18	295	0	0.00	2	0.68	2	0.68	1	0.34
38	13/09 - 19/09	<18	327	0	0.00	0	0.00	1	0.31	1	0.31
39	20/09 - 26/09	<18	351	0	0.00	2	0.57	4	1.14	3	0.85
40	27/09 - 03/10	<18	340	1	0.29	1	0.29	4	1.18	3	0.88
41	04/10 - 10/10	<18	363	3	0.83	1	0.28	2	0.55	1	0.28
42	11/10 - 17/10	<18	338	3	0.89	0	0.00	2	0.59	4	1.18
43	18/10 - 24/10	<18	406	3	0.74	1	0.25	1	0.25	3	0.74
44	25/10 - 31/10	<18	426	4	0.94	1	0.23	4	0.94	3	0.70
45	01/11 - 07/11	<18	469	2	0.43	3	0.64	4	0.85	4	0.85
46	08/11 - 14/11	<18	548	1	0.18	0	0.00	3	0.55	2	0.36
47	15/11 - 21/11	<18	523	0	0.00	0	0.00	0	0.00	2	0.38
48	22/11 - 28/11	<18	481	1	0.21	4	0.83	3	0.62	3	0.62
49	29/11 - 05/12	<18	392	0	0.00	1	0.26	1	0.26	3	0.77
50	06/12 - 12/12	<18	332	0	0.00	0	0.00	0	0.00	0	0.00
51	13/12 - 19/12	<18	305	0	0.00	0	0.00	0	0.00	0	0.00
52	20/12 - 26/12	<18	336	0	0.00	0	0.00	1	0.30	0	0.00

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 since early 2020, please interpret the data with caution.