Table 1. The most recent common ancestor (MRCA) stratified by host and country of collection of Lassa mammarenavirus (LASV) S and L segments.
Samples were collected between 1969–2018.
| Host species | Country | S segment MRCA | L segment MRCA |
|---|---|---|---|
| Homo sapiens (n = 1181) | Benin | 1995 | 1989 |
| Guinea | 1895 | 1871 | |
| Liberia | 1895 | 1627 | |
| Nigeria | 1681 | 1498 | |
| Sierra Leone | 1901 | 1874 | |
| Togo | 2016 | 2014 | |
| Hylomyscus pamfi (n = 2) | Nigeria | 1681 | 1498 |
| Mastomys erythroleucus (n = 18) | Guinea | 1975 | 2010 |
| Nigeria | 2008 | 2006 | |
| Mastomys natalensis (n = 36) | Guinea | 1938 | 1997 |
| Mali | 1951 | 2007 | |
| Sierra Leone | 1909 | 1979 |