Table 1.
HCV subtypes and subgroup Time to Most Recent Common Ancestor (TMRCA) and rate of population growth.
| Subtype | Samples (n) | TMRCA (upper and lower) | Growth rate (r) |
|---|---|---|---|
| 1a | 98 | 1979 (1967–1987) | 0.4 |
| 3a | 149 | 1967 (1955–1980) | 0.32 |
| 1b all | 218 | 1923 (1844–1967) | 0.26 |
| 1b G1 | 79 | 1966 (1947–1981) | 0.3 |
| 1b G2 | 90 | 1972 (1959–1983) | 0.4 |
| 1b G3 | 6 | 1983 (1975–1991) | – |
| 1b G4 | 36 | 1973 (1955–1985) | 0.26 |
TMRCA, Time to Most Recent Common Ancestor; r, rate of population growth.
The growth rate was not estimated for G3 because it includes only six sequences.