A man who returned from Liberia with documents saying he was cured of Ebola was quarantined as a precautionary measure when he arrived at Delhi airport. The health ministry said the man who was shown to be negative for Ebola in tests conforming to WHO guidelines, later showed traces of the virus in his semen. As it is a fact that during convalescence from Ebola persons continue to shed the virus in bodily fluids for variable periods, the presence of the virus in his semen samples could be transmitted through sexual activity up to 90 days from the time of clinical cure. He will be kept in quarantine till the virus is no longer present in his body and will undergo tests over the next 10 days or so. Declining to name the man the ministry official said it is not an Ebola case, he is an Ebola-treated patient who is negative in blood but whose body fluid is positive and he has no symptoms. Many experts say densely populated India is not adequately prepared to handle any spread of the highly infectious haemorrhagic fever among its 1.2 billion people. Also, hygiene standards are low, especially in small towns and villages. According to figures from the WHO the current outbreak of Ebola is the worst on record. It has killed at least 5177 people mostly in Sierra Leone, Liberia and Guinea.