The World Health Organization, WHO, says the number of people killed by the deadly Ebola virus in West Africa has risen to 467.

Sixty-eight of the deaths have been recorded since June 23.

The WHO says the number of cases had risen from 635 on June 23, to 759, a 20 percent increase.

It’s the largest outbreak – in terms of cases, deaths and geographical spread – to affect Guinea, Sierra Leone and Liberia.

Ebola, a haemorrhagic fever, has no cure and is spread by contact with the fluids of infected people or animals, such as urine, sweat and blood.