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. 2022 Dec;28(12):2455–2462. doi: 10.3201/eid2812.220969

Table 1. Characteristics of population completing isolation in study of students in a university-managed isolation program, January 1–February 11, 2022*.

Characteristic No. (%) persons by days since last negative test
Total no. (%), N = 323
≤4 d, n = 181 5–9 d, n = 48 ≥10 d, n = 93 Unknown, n = 1
Self-reported symptoms before or at diagnosis
No 51 (28) 17 (35) 46 (49) 1 (100) 115 (36)
Yes 130 (72) 29 (60) 46 (49) 0 (0) 205 (63)
Unknown
0 (0)
2 (4)
1 (1)
0 (0)
3 (1)
Prior infection >90 d
No 171 (94) 46 (96) 84 (90) 1 (100) 302 (93)
Yes
10 (6)
2 (4)
9 (10)
0 (0)
21 (7)
No. vaccine doses
1 3 (2) 0 (0) 6 (6) 0 (0) 9 (3)
2 38 (21) 16 (33) 31 (33) 1 (100) 86 (27)
3 136 (75) 30 (62) 54 (58) 0 (0) 220 (68)
4 1 (1) 1 (2) 0 (0) 0 (0) 2 (1)
Unknown 3 (2) 1 (2) 2 (2) 0 (0) 6 (2)

*Category totals may not add to 100% because of rounding.