Doctors doing follow-up research on last year's Ebola epidemic in Western Africa now say the virus can persist for up to nine months in male survivors.

FOX News Radio's Eben Brown reports:

Both the World Health Organization and Sierra Leone's Health Ministry say men who recovered from Ebola virus disease were still showing a presence of the virus in semen samples for up to nine months.

These findings are renewing a call for supportive care for Ebola survivors, who despite recovery could become ill again or transmit the virus to others.

A Scottish nurse who made headlines when infected while caring for Ebola patients in Africa was just re-hospitalized last week, and is now critically ill, despite recovering months ago.

Doctors say the virus had been dormant in her body all this time.

Eben Brown, FOX News Radio.