About two-thirds of patients in Congo's latest Ebola outbreak have been women, the World Health Organization said on Thursday, calling for more focus on gender in disease control and prevention.

The outbreak in eastern Democratic Republic of Congo is the world's second-largest and has infected 663 people so far, killing 407, according to health ministry data.

In past Ebola outbreaks, including the largest, which killed 11,300 people in West Africa in 2014-2016, the proportion of women and men affected was roughly equal, WHO experts said. This is the 10th outbreak recorded in Congo.