Table 3.
Antigenic relatedness (R-value) among the five viruses as determined by the degree of cross-HI activity.
|
R-value |
|||||
|---|---|---|---|---|---|
| SW/510/21 | SW/700/21 | SW/209/20 | SW/188/20 | SW/198/20 | |
| SW/510/21 | 1.000 | 0.500 | 0.559 | 0.707 | 0.500 |
| SW/700/21 | 0.500 | 1.000 | 0.500 | 1.000 | 0.632 |
| SW/209/20 | 0.559 | 0.500 | 1.000 | 0.884 | 0.707 |
| SW/188/20 | 0.707 | 1.000 | 0.884 | 1.000 | 1.000 |
| SW/198/20 | 0.500 | 0.632 | 0.707 | 1.000 | 1.000 |
Notes: R-values shown in bold indicate significant differences. R = 1 indicates the two viruses pose the same antigenicity, 0.67 ≤ R < 1 indicates no significant antigenic difference between the two viruses, and R < 0.5 indicates a significant antigenic difference between the viruses.