The World Health Organization said Wednesday the number of Ebola cases has risen in Guinea and Sierra Leone for the second consecutive week.
In the previous week, 13 new cases had been found in Guinea, up from nine reported a week before that.
The pattern was similar in Sierra Leone, where 12 new cases were found in the last week of May compared to only three the previous week.
Ebola has killed 11 158 of the more than 27000 people infected.
The number of health workers affected in Sierra Leone, Guinea and Liberia has risen to 869, of whom 507 have died, since the current epidemic broke out in west Africa in December 2013.
Liberia was declared Ebola-free in May, but hopes that Sierra Leone and Guinea would quickly follow suit have been dashed by the rising infections.
According to AFP,the virus also reappeared in the western Guinean region of Kindia, with three new cases identified there.
