Table 2.

Early and late attack rates by accommodation unit or type of work activity in the nursing home, France, January 2012

	Total (1)	Early cases			Late cases			All cases
		No. at risk (2)*	No. of cases (3)	AR (3/2)	No. at risk (4)†	No. of cases (5)	AR (5/4)	No. of cases (3 + 5)	AR (3 + 5)/1
Residents
Unit location
1	19	19	4	21%	15	5	33%	9	47%
2	19	19	7	37%	12	5	42%	12	63%
3	19	18	7	39%	12	3	25%	10	53%
4	18	18	12	67%	6	0	0%	12	67%
5	19	19	8	42%	11	2	18%	10	53%
Total	94	93	38	41%	56	15	27%	53	56%
Staff members
Activities in close contact with residents
Yes	38	17	8	47%	28	14	50%	22	58%
No	13	12	7	58%	6	0	0%	7	54%
Total	51	29	15	52%	34	14	41%	29	57%

AR, Attack rate.

^*Individuals who ate at the festive lunch.

^†Individuals who were not early cases.