Africa

By wiping out native species, an immigrant unleashes a cascade of ecological damage

More than 200 experts recommend fast-tracking biomedical interventions

Infected doctor kept it secret; hundreds under surveillance

WHO and Doctors Without Borders again stress need for scaled-up international action

WHO reports 454 new cases and presents $490 million "road map" to end epidemic in 6 to 9 months

Thirteen fatalities reported among 24 cases in second, apparently unrelated, outbreak

New study provides first estimates for illegal killing across continent

Treatment strategy tried in past for Ebola and other viral diseases, but its effectiveness remains unclear

Peter Piot enters the outbreak zone in Zaire, and the deadly virus responsible gets a name: Ebola

With experimental treatments in short supply, some researchers urge "repurposing" medicines

Uganda and South Africa will team up on study of causes of homosexuality

Numerous ethical dilemmas remain, however

Peter Piot reveals the "reckless" methods by which a small lab in Belgium first identified the lethal Ebola virus in 1976

Only third time designation made; screening of all travelers from affected countries recommended

Activists fear that the law could still be reinstated

A Science reporter tries to track down these mysterious canines