Table 2. Estimated mean genetic distances between each genotype and sub-lineage of human metapneumovirus (HMPV) in the fusion (F) and attachment (G) genes (in %).
| Gene | Genotype/sub-lineage | A1 | A2a | A2b | Novel A2 sub-lineage | B1 | B2 |
|---|---|---|---|---|---|---|---|
| F | A1 | 0.9 | 1.1 | 1.2 | 1.8 | 1.9 | |
| A2a | 5.9 | 0.7 | 0.8 | 2.0 | 1.9 | ||
| A2b | 7.5 | 3.8 | 0.7 | 2.1 | 2.0 | ||
| Novel A2 sub-lineage | 7.9 | 4.4 | 3.6 | 2.0 | 2.0 | ||
| B1 | 17.7 | 18.4 | 19.0 | 18.7 | 1.1 | ||
| B2 | 18.2 | 18.5 | 19.3 | 19.3 | 7.0 | ||
| G | A1 | 1.7 | 1.8 | 2.0 | 5.4 | 4.7 | |
| A2a | 22.6 | 1.1 | 1.2 | 4.9 | 5.0 | ||
| A2b | 25.0 | 13.0 | 1.0 | 5.4 | 5.6 | ||
| Novel A2 sub-lineage | 27.4 | 12.9 | 11.9 | 5.5 | 6.0 | ||
| B1 | 87.7 | 78.5 | 85.7 | 85.8 | 2.1 | ||
| B2 | 81.8 | 77.8 | 86.6 | 88.3 | 26.9 |
Standard error estimates of the mean genetic distances are shown in the upper diagonal panel.