Table 2.

Characteristics of Pandemic influenza A (H1N1) cases by geographic region (May-September 2009) in Hong Kong

Geographic regions	Attack rate (%)	No. of cases	Case density per km2	Proportional distribution
				Infant (%) aged 0-4	Student (%) aged 5-19	Adult (%) aged 20-64	Elder (%) aged > 64
Hong Kong Island	0.41	5288	64	9.21	56.88	32.98	0.93
Kowloon Peninsula	0.37	7412	169	10.85	54.13	34.04	0.98
Shatin & Taipo	0.32	2908	22	10.73	51.41	36.38	1.48
Sai Kung	0.38	1562	15	12.04	56.53	30.73	0.70
North West	0.34	4464	15	12.52	53.72	32.91	0.85
South West	0.30	2781	20	12.94	54.80	31.28	0.97