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Respiratory Infections during SARS Outbreak, Hong Kong, 2003

Janice Y.C. Lo*, Thomas H.F. Tsang*, Yiu-Hong Leung*, Eugene Y.H. Yeung*, Thomson Wu*, and Wilina W.L. Lim*

Author affiliations: *Department of Health, Hong Kong Special Administrative Region, People's Republic of China

Change in proportion of positive specimens (PPS) in 2003 for various viruses with reference to the period 1998–2002*

Virus		Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec
Influenza
	No. isolates	327	419	786	105	22	58	96	54	121	50	10	35
	No. tests performed	1,166	1,530	5,432	3,758	1,495	974	776	665	1,283	1,193	1,008	1,407
	PPS (03)	0.28	0.27	0.14	0.03	0.01	0.06	0.12	0.08	0.09	0.04	0.01	0.02
	Average PPS (98–02)	0.235	0.368	0.329	0.154	0.127	0.143	0.186	0.153	0.063	0.022	0.019	0.044
	Range of PPS (98–02)	0.067–0.321	0.143–0.519	0.121–0.517	0.065–0.203	0.043–0.194	0.072–0.216	0.145–0.232	0.123–0.173	0.040–0.105	0.009–0.044	0.008–0.030	0.022–0.110
	% change†	+19	–26	–56	–82	–88	–58	–33	–47	+49	+87	–49	–44
Parainfluenza
	No. isolates	29	35	75	12	2	1	11	26	29	68	75	112
	No. tests performed	1,166	1,530	5,432	3,758	1,495	974	776	665	1,283	1,193	1,008	1,407
	PPS (03)	0.02	0.02	0.01	0.00	0.00	0.00	0.01	0.04	0.02	0.06	0.07	0.08
	Average PPS (98–02)	0.035	0.025	0.022	0.036	0.037	0.034	0.023	0.017	0.027	0.061	0.081	0.065
	Range of PPS (98–02)	0.014–0.106	0.014–0.053	0.008–0.046	0.021–0.046	0.024–0.054	0.026–0.046	0.017–0.034	0.010–0.028	0.014–0.043	0.025–0.102	0.031–0.149	0.035–0.156
	% change†	–28	–8	–38	–91	–96	–97	–38	+135	–16	–7	–9	+22
RSV
	No. isolates	49	53	66	24	6	3	8	53	181	48	12	5
	No. tests performed	1,166	1,530	5,432	3,758	1,495	974	776	665	1,283	1,193	1,008	1,407
	PPS (03)	0.04	0.03	0.01	0.01	0.00	0.00	0.01	0.08	0.14	0.04	0.01	0.00
	Average PPS (98–02)	0.014	0.021	0.055	0.104	0.081	0.066	0.072	0.094	0.092	0.036	0.022	0.032
	Range of PPS (98–02)	0.003–0.054	0.010–0.065	0.037–0.090	0.055–0.155	0.049–0.112	0.042–0.098	0.038–0.113	0.046–0.126	0.057–0.118	0.018–0.051	0.001–0.060	0.001–0.072
	% change†	+203	+64	–78	–94	–95	–95	–86	–15	+54	+13	–47	–89
Adenovirus
	No. isolates	61	78	84	41	5	0	1	2	4	7	8	17
	No. tests performed	1,166	1,530	5,432	3758	1,495	974	776	665	1,283	1,193	1,008	1,407
	PPS (03)	0.05	0.05	0.02	0.01	0.00	0.00	0.00	0.00	0.00	0.01	0.01	0.01
	Average PPS (98–02)	0.034	0.030	0.035	0.056	0.055	0.058	0.068	0.044	0.038	0.049	0.052	0.074
	Range of PPS (98–02)	0.012–0.058	0.019–0.052	0.017–0.071	0.012–0.121	0.022–0.110	0.028–0.105	0.032–0.091	0.029–0.058	0.026–0.054	0.045–0.055	0.042–0.062	0.058–0.093
	% change†	+52	+72	–55	–81	–94	–100	–98	–93	–92	–88	–85	–84
Hepatitis B
	No. of positive test results	16	11	13	18	20	13	19	20	22	21	15	20
	No. of tests performed	143	98	135	99	97	118	139	135	120	111	102	131
	PPS (03)	0.112	0.112	0.096	0.182	0.206	0.110	0.137	0.148	0.183	0.189	0.147	0.153
	Average PPS (98–02)	0.147	0.132	0.127	0.129	0.125	0.156	0.154	0.156	0.168	0.144	0.167	0.148
	Range of PPS (98–02)	0.083–0.228	0.079–0.190	0.093–0.153	0.070–0.168	0.085–0.162	0.096–0.188	0.104–0.186	0.068–0.228	0.086–0.250	0.081–0.233	0.099–0.249	0.082–0.197
	% change†	–24	–15	–24	+41	+65	–29	–11	–5	+9	+32	–12	+3

*RSV, respiratory syncytial virus.
†Percentage change of PPS in 2003 with respect to the average PPS from 1998 to 2002.

Main Article

Page created: February 17, 2012

Page updated: February 17, 2012

Page reviewed: February 17, 2012

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Volume 11, Number 11—November 2005

Dispatch

Respiratory Infections during SARS Outbreak, Hong Kong, 2003

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