Baseline* | Month 1 | Month 2 | Month 3 | Month 4 | Month 5 | Month 6 | > 6 Months | ||||||||
---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
n | n | % | n | % | n | % | n | % | n | % | n | % | n | % | |
Seropositive cohort | |||||||||||||||
IgM | |||||||||||||||
Negative | 0 | 59 | 48.8% | 257 | 61.8% | 255 | 78.7% | 227 | 88.0% | 155 | 93.4% | 168 | 92.3% | 99 | 93.4% |
Positive | 973 | 62 | 51.2% | 159 | 38.2% | 69 | 21.3% | 31 | 12.0% | 11 | 6.6% | 14 | 7.7% | 7 | 6.6% |
IgG | |||||||||||||||
Negative | 0 | 23 | 41.1% | 73 | 38.6% | 57 | 57.6% | 79 | 71.2% | 34 | 75.6% | 38 | 95.0% | 17 | 70.8% |
Positive | 532 | 33 | 58.9% | 116 | 61.4% | 42 | 42.4% | 32 | 28.8% | 11 | 24.4% | 2 | 5.0% | 7 | 29.2% |
IgG or IgM | |||||||||||||||
Negative | 0 | 63 | 42.6% | 255 | 52.4% | 264 | 73.3% | 254 | 83.6% | 163 | 88.6% | 181 | 92.3% | 107 | 89.9% |
Positive | 1172 | 85 | 57.4% | 232 | 47.6% | 96 | 26.7% | 50 | 16.4% | 21 | 11.4% | 15 | 7.7% | 12 | 10.1% |
IgG and IgM | |||||||||||||||
Negative | 0 | 19 | 65.5% | 74 | 64.4% | 44 | 71.0% | 52 | 81.3% | 23 | 85.2% | 25 | 96.2% | 8 | 72.7% |
Positive | 330 | 10 | 34.5% | 41 | 35.7% | 18 | 29.0% | 12 | 18.8% | 4 | 14.8% | 1 | 3.9% | 3 | 27.3% |
Subset with initial positive IgG and IgM | |||||||||||||||
IgG and IgM | |||||||||||||||
Negative | 0 | 19 | 65.5% | 74 | 64.4% | 44 | 71.0% | 52 | 81.3% | 23 | 85.2% | 25 | 96.2% | 8 | 72.7% |
Positive | 330 | 10 | 34.5% | 41 | 35.7% | 18 | 29.0% | 12 | 18.8% | 4 | 14.8% | 1 | 3.9% | 3 | 27.3% |
IgG or IgM | |||||||||||||||
Negative | 0 | 13 | 44.8% | 44 | 38.3% | 33 | 53.2% | 38 | 59.4% | 17 | 63.0% | 22 | 84.6% | 6 | 54.6% |
Positive | 330 | 16 | 55.2% | 71 | 61.7% | 29 | 46.8% | 26 | 40.6% | 10 | 37.0% | 4 | 15.4% | 5 | 45.5% |
Subset with negative test ≤ 60 days prior | |||||||||||||||
IgG or IgM | |||||||||||||||
Negative | 0 | 38 | 52.1% | 90 | 65.7% | 58 | 69.1% | 48 | 72.7% | 47 | 79.7% | 36 | 85.7% | 31 | 83.8% |
Positive | 371 | 35 | 48.0% | 47 | 34.3% | 26 | 31.0% | 18 | 27.3% | 12 | 20.3% | 6 | 14.3% | 6 | 16.2% |