An Indian man who was cured of the Ebola virus in Liberia is under isolation at New Delhi's Indira Gandhi International airport after tests showed traces of the deadly virus in his semen, according to Indian’s Health Ministry.
Officials said the man, 26, was put into quarantine “as a matter of abundant caution” and added that he would only be released from the special airport health facility when his body fluids test negative for Ebola.
Three blood samples taken from the man tested negative for the disease, which means he is cured according to standards set by the US Centres for Disease Control and Prevention (CDC).
But as traces of Ebola can be found in semen for up to seven weeks, the CDC advises survivors of the virus - which has killed more than 5,000 people in the West African countries - to use condoms or not to have sex for three months.
The Health Ministry said in a statement: "The person concerned is a treated and cured case of Ebola virus disease.
"All necessary precautions are being taken at the isolation facility. This would rule out even the remote possibility of spread of this disease by the sexual route."
See the Ebola outbreak mapped
See the Ebola outbreak mapped
1/7 25 March 2014
This outbreak of the Ebola virus first emerged in the Guéckédou region of Guinea, at a crossroads with both Liberia and Sierra Leone
2/7 31 March
On 31 March the WHO confirmed the outbreak was now international, spreading first into Liberia's northern-most Lofa region
3/7 27 May
The virus spread to Sierra Leone at the end of May - just as agencies were hoping the worst was over
4/7 27 July
In Sierra Leone the virus boomed, and then it spread to Nigeria when the Liberian diplomat Patrick Sawyer flew from Monrovia to Lagos
5/7 9 August
The Nigeria cases sparked fears around the world, and there have now been deaths in Spain and Saudi Arabia involving people who had travelled to West Africa. The numbers of cases continue to rise
6/7 17-20 September
In mid-September, Senegal confirmed its first case linked to the Ebola outbreak, a development the WHO described as a top priority emergency. Numbers of cases continued to grow exponentially in Guinea, Sierra Leone and Liberia, as experts warned they could number one million by January if not contained
7/7 8 October
Two cases of Ebola have now been reported in the US and Europe - the first times the virus has been contracted among health workers outside Africa
The man arrived at the airport on 10 November, carrying a certificate from the Liberian government stating that he had been treated for Ebola, and declared free of any symptoms.
As a precaution, he was placed in quarantine as authorities tested his blood for several days.
No cases of the virus which has caused devastation in Liberia, Sierra Leone and Guinea have been reported in Asia.
It is feared that an outbreak could spread quickly in a region where billions of people live in poverty, and public health services may not be robust enough to contain the disease.
The case in India comes as President Barack Obama warned that Ebola is a threat to the world, and West Africa is "nowhere near out of the woods."
During a meeting with the US' Ebola response team, President Obama said it was important to "push forward" on efforts to stop Ebola at its source.
Additional reporting by AP