Table 5.

Participants’ attribution matrix by the time of infection, sex, and age group (n=110).

Age group (years)			Delta perioda (n=46), participants, n		Omicron periodb (n=64), participants, n
20-29
	Male	9		10
	Female	16		15
	Total	25		25
30-39
	Male	4		9
	Female	1		9
	Total	5		18
40-49
	Male	7		6
	Female	2		5
	Total	9		11
50-59
	Male	3		4
	Female	3		3
	Total	6		7
60-69
	Male	0		2
	Female	0		0
	Total	0		2
≥70
	Male	1		1
	Female	0		0
	Total	1		1

^aDelta period: July 2021 to December 2021.

^bOmicron period: January 2022 to June 2022.