Table 1.
Viral subtype | HAU 25 μl | ||||
---|---|---|---|---|---|
<20 | 20 | 40 | 80 | 160 | |
H3N8_63 | 113 | 0 | 0 | 0 | 0 |
H3N8_97 | 106 | 2 | 3 | 0 | 2 |
H1N1pdm09 | 112 | 0 | 1 | 0 | 0 |
H1N1 | 108 | 4 | 0 | 0 | 1 |
H3N2 | 110 | 2 | 0 | 0 | 1 |
Values are expressed as hemagglutination units (HAU) at 25 μl.
Sera were considered positive when titers ≥40 were obtained.