Table 1. HHI and MN assay titers for serum samples from woman with subclinical influenza A(H5N1) virus infection, Vietnam, 2011.
| Clade and sample |
HHI |
MN |
| Clade 1 | ||
| First sample, day 5 | <20 | ND |
| Second sample, day 11 | 40 | <10 |
| Third sample, day 41 |
40 |
<10 |
| Clade 2.3.2.1 | ||
| First sample, day 5 | <20 | ND |
| Second sample, day 11 | 80 | 80 |
| Third sample, day 41 |
160 |
160 |
| Clade 2.3.4 | ||
| First sample, day 5 | <20 | ND |
| Second sample, day 11 | 80 | 40 |
| Third sample, day 41 | 160 | 40 |
*Sample days are days since disease onset in index case-patient. HHI, horse hemagglutination inhibition; MN microneutralization; ND, not done.