Table 5. Pandemic (H1N1) 2009-infected individuals with or without history of international travel within 7 days before onset.

	With history of international travel (n = 151)		Without history of international travel (n = 671)
	n	%	n	%
Period I
28 April–7 May	3	(75.0)	1	(25.0)
8–14 May	1	(1.7)	59	(98.3)
15–21 May	5	(1.8)	276	(98.2)
Period II
22–28 May	8	(23.5)	26	(76.5)
29 May–4 June	16	(40.0)	24	(60.0)
5–11 June	38	(20.8)	145	(79.2)
12–18 June	80	(36.4)	140	(63.6)