Table 1.
Old World (OW) and New World (NW) arenaviruses.
| Classification | Virus | Geographic Location | Incidence of Disease |
|---|---|---|---|
| Old World | LCMV | Worldwide | Over 5% of people show evidence of prior exposure, <1% mortality |
| Lassa virus | West Africa | Up to 500,000 infections annually, ~5000 deaths/year | |
| Lujo virus | South Africa | 5 identified cases, 4 fatal | |
| New World | Junín virus | Argentina | 300–1000 cases/year before Candid #1 vaccination program, 30–50 cases/year after introduction of vaccine, 15–30% mortality |
| Machupo virus | Bolivia | 1962–1964: 1000 cases; 1990s: 19 cases; 2007–2008: >200 cases; ~20% mortality | |
| Sabiá virus | Brazil | 1 naturally occurring case, fatal | |
| Guanarito virus | Venezuela | 618 cases, 23% fatal | |
| Chapare virus | Bolivia | 1 confirmed case, fatal |