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Number of sequences of the L and S segments of the Lassa virus genome from 1969 to 2019 used in this study.
| Year | Number of Lassa virus genome sequences | |
|
|
L segment | S segment |
| 1969 | 1 | 1 |
| 1974 | 0 | 1 |
| 1976 | 1 | 1 |
| 1977 | 0 | 1 |
| 1981 | 1 | 2 |
| 1982 | 1 | 1 |
| 1999 | 1 | 1 |
| 2000 | 2 | 2 |
| 2003 | 1 | 1 |
| 2008 | 11 | 11 |
| 2009 | 12 | 12 |
| 2010 | 10 | 11 |
| 2011 | 12 | 10 |
| 2012 | 14 | 13 |
| 2013 | 4 | 8 |
| 2014 | 3 | 4 |
| 2015 | 3 | 5 |
| 2016 | 12 | 13 |
| 2017 | 3 | 3 |
| 2018 | 21 | 24 |
| 2019 | 20 | 20 |
| Total | 133 | 145 |
