Table 2.
Emerging and reemerging viral pathogens
| Virus/disease | Case frequency | Main geographic distribution |
|---|---|---|
| Ebola | 2013–2015 outbreaks: 28 639 cases and 11 316 deaths [105] | Central and West Africa |
| Marburg | Sporadic outbreaks; largest was in Angola in 2004 with 252 cases [106] | Central Africa |
| Lassa Fever | 100 000–300 000 cases/year [107] | West Africa |
| SARS | 8098 cases during 2003 outbreak [108] | Southeast Asia |
| MERS-CoV | 1638 cases since 2012 [109] | Arabian peninsula |
| Chikungunya | >1.3 million cases as of April 2015 in the Americas [110] | Africa, Southeast Asia, Americas |
| Zika | Not available [111] | South/Central America since May, 2015 (previously Africa, Asia) |
SARS = severe acute respiratory syndrome; MERS-CoV = Middle East respiratory syndrome coronavirus.