MEDICAL experts from the US Center of Disease Control (CDC) in Atlanta have expressed fears that a recent ebola trial vaccine used to treat patients only happens to be effective on white Caucasians. Across the West African sub-region as a whole, over 1,400 people have died from the highly contagious ebola virus disease (EVD) including nine in Nigeria, who came in contact with a visiting Liberian. Several European and American doctors who have been treating patients have also contracted the virus but all of them have recovered after being treated with drugs like Zmapp. At the moment, the CDC is trialling several other anti-ebola drugs and is currently working on a vaccine developed by ThomasSmithKline. This vaccine uses a strain of a West Nile monkey cold virus called Ape Multivirus Type 5, to deliver benign genetic material of the West African strain of ebola. According to medical experts, the genetic material given to the patient in this new drug is not able to replicate and poses virtually no health risk. According to the CDC, the trial was doled out 200 people but only proved effective to those with white skin and some scientists believe high levels of melanin in black people may somehow be affecting the sample. A CDC spokesman said: "Early tests of an experimental drug, which would effectively combat the spread of ebola, have proved successful only in those with white skin. We are working diligently to improve the sample to be able to help all those who are in need.” Last month, two white Americans were flown to Emory Hospital in Atlanta were cured of EVD while thousands continue to die in Africa. Conspiracy theorists believe the US government has a cure for the disease but has no plans to share it with Africans