What to know about the Ebola outbreak that the WHO has declared a global health emergency

The World Health Organization has declared the Ebola outbreak in Congo and Uganda a public health emergency of international concern, with 336 suspected cases and 88 deaths reported. The outbreak is caused by the Bundibugyo virus, a rare variant of the Ebola disease with no approved therapeutics or vaccines. The WHO's emergency declaration aims to spur donor agencies and countries into action.