Two people from the same family have tested positive for Ebola in Guinea, the government said Thursday, the first re-emergence of the deadly virus in the country since the outbreak there was declared over in late December.

The government's announcement came on the same day that the World Health Organization said the latest flare-up of Ebola in neighbouring Sierra Leone had officially ended.  

The virus has claimed over 11,300 lives in west Africa since the outbreak first began in Guinea in December 2013.