A Indian man who was cured of Ebola in Liberia and sent back to India has tested positive for the virus. The news marks India's first confirmed case of Ebola.

The man was successfully treated in Liberia and was quarantined as a precaution when he arrived at an airport in New Delhi on Nov. 10. He has not displayed symptoms of Ebola, but his semen showed traces of the virus, India's health ministry said in a statement Tuesday.

According to the CDC, semen can test positive for Ebola as many as 90 days after a patient is cured. The man will be kept in isolation as a precaution until his semen no longer tests positive for the disease.

Though the virus is still present in the man's system, he was cured of Ebola and is not considered a threat.