Table 2.
Serum and Yamagata lineage virus. The designation for each post-vaccination serum (column 1) and year of vaccine receipt (column 2) are listed. HAI titers, the geometric mean from four replicates, toward the contemporary PK_WT (B/Phuket/3073/2013) virus are shown in column 3. The number of passages used to attain the escape virus and the name of each virus, which incorporates the serum name, are shown in the last two columns.
| Serum | Years Vaccinated | PK_WT HAI Titer | Number of Passages | Escape Virus |
|---|---|---|---|---|
| F09 | 2002, 2003 | 31 | 4 | PK/F09 |
| M50 | 2002, 2003 | 24 | 3 | PK/M50 |
| M74 | 2002, 2003 | 118 | 3 | PK/M74 |
| M09 | 2010, 2011 | 34 | 4 | PK/M09 |
| M56 | 2010, 2011 | 37 | 4 | PK/M56 |
| F16 | 2010, 2011 | 67 | 3 | PK/F16 |