TABLE 2.
No. of samples HI negative |
||||
---|---|---|---|---|
Titer | H1 | H3 | B/Yamagata/1688 | B/Victoria/287 |
10 | 0 | 1 | 2 | 0 |
20 | 44 | 26 | 56 | 43 |
40 | 27 | 46 | 60 | 30 |
80 | 7 | 31 | 47 | 23 |
160 | 1 | 26 | 34 | 5 |
320 | 1 | 20 | 13 | 1 |
640 | 1 | 22 | 9 | 2 |
≥1,280 | 1 | 9 | 4 | 0 |
Total | 82 | 181 | 225 | 104 |
Eight of 397 samples were positive in ELISA. Several samples were reactive for multiple seasonal influenza viruses.