Table 1.

Summary of Hong Kong Influenza surveillance data

Y	Data	Description	Type	Period
Y1	flu-HA	Hospital admissions with principle diagnosis of influenza	Count	1998 to 2011
Y2	GOPC	Weekly ILI consultations at sentinel general out-patient clinics per 1,000 consultations	Percentage	1998 - 2011
Y3	CCC/KG	Percentage of children at the sentinel child care centers and kindergartens with fever	Percentage	2007 to 2011
Y4	GP	Weekly ILI consultations at sentinel physicians’ offices per 1,000 consultations	Percentage	1998 - 2011
Y5	RHE	Average number of elderly with fever per day per 1,000 elderly at the residential care homes	Percentage	2007 to 2011
Y6	Lab(%pos)	Percentage of confirmed influenza cases among all the tested samples	Percentage	1997 to 2009
Y7	P&I-HA	Hospital admissions with principle diagnosis of pneumonia and influenza	Count	1998 to 2011
Y8	P&I-HA (0-15 yr)	Hospital admissions with principle diagnosis of pneumonia and influenza for patient aged 0 to 15 years old.	Count	1998 to 2011
Y9	P&I-HA (65+ yr)	Hospital admissions with principle diagnosis of pneumonia and influenza for patient aged over 65 years old.	Count	1998 to 2011
Y10	Lab(#spm)	Number of specimens received for laboratory testing	Count	1997 to 2009
Y11	Lab(#pos)	Number of specimens tested positive for influenza virus	Count	1997 to 2009
Pandemic Only Data Series
Y12	DFC	Number of ILI related patient visits at Designated Flu Clinics (8 clinics)	Count	June 13th 2009 – May 23rd 2010
Y13	NID	Number of confirmed influenza infection reports from all registered medical practitioners in HK	Count	April 27th 2009 – October 8th 2010
Xc	Incidence rate (5-14 yr)	Reliable estimate for incidence rate among children between 5 to 14 years old based on a serological study	Percentage	June 15th 2009 – November 22nd 2009
Xa	Incidence rate (all age)	Reliable estimate for incidence rate for all age group based on a serological study	Percentage	June 15th 2009 – November 22nd 2009