The WHO has declared a global health emergency after more than 80 cases of Ebola were confirmed across two African countries. Here's why the organisation is calling for preparedness, not panic.

Some 88 people have died from the highly contagious haemorrhagic fever in the DR Congo, with one death in Uganda, and at least 336 suspected cases.

Officials suspect the disease has caused 80 deaths in the Democratic Republic of Congo so far.