Patient number | Â | Maternal plasma | Infant plasma |
---|
 | 1449 | 88 | 78 |
Rapid progressors | 2669 | 93 | 45 |
 | 2873 | 42 | 0 |
 | 1084 | 79 | 60 |
Slow progressors | 1157 | 88 | 69 |
 | 1984 | 55 | 0 |
- 1For rapid progressors, the first viral isolates were obtained at month 2 after birth, whereas the first viral isolates in the slow progressors were from month 4 (1084 infant) or 6 (infant 1157 and 1984). Neutralization assay was done using 1:20 of either maternal or infant plasma