Sierra Leone launches Ebola survivor sex study Sierra Leone's ministry of health has launched a study to try to establish whether Ebola can be passed on through sexual contact with male survivors of the virus. The WHO says this is a strong possibility. More than nine thousand people have been killed by Ebola mostly in Sierra Leone, Guinea and Liberia. Previous research has suggested Ebola can stay in semen for at least three months after a man has recovered from the virus. Survivors are being urged to use condoms until more is known, and for at least three months after testing negative for the Ebola virus. BBC