Story highlights Man, 26, traveled to India from Liberia on November 10

Indian authorities confirmed traces of the virus in his semen after tests

He is being kept in isolation in a special health facility at Delhi's international airport

India's health minister has ordered increased surveillance of passengers at airports and seaports

New Delhi, India (CNN) An Ebola survivor has been quarantined in India after his semen tested positive for the virus, health officials there have announced.

The 26-year-old man, an Indian national, traveled to New Delhi from Liberia on November 10, almost two months after he was hospitalized in the West African nation after showing symptoms of the illness, India's health ministry said in a statement.

He was released from the Liberian hospital on September 30 with documents declaring him free of clinical signs linked to Ebola, the ministry added.

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As a precautionary measure, Indian authorities carried out tests on his body fluids, which confirmed traces of the virus in his semen, the statement said.

"Currently, this person is not having any symptoms of the disease. However, he would be kept under isolation in the special health facility of (the) Delhi Airport Health Organization, till such time his body fluids test negative and he is found medically fit to be discharged," it said.

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