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Relationship of HI titers and IgG positivity in ELISA against p-H1N1-09 virus
| HI titer | No. of samples ELISA positive/no. tested (%) |
|---|---|
| 0 (negative) | 8/397 (2) |
| 1:10 | 4/117 (3.5) |
| 1:20 | 101/101 (100) |
| 1:40 | 77/77 (100) |
| 1:80 | 44/44 (100) |
| 1:160 | 26/26 (100) |
| 1:320 | 13/13 (100) |
| 1:640 | 6/6 (100) |
| 1:1,280 | 2/2 (100) |
