dr. krozier contracted ebola in sierra leone so sick almost died. but after a month add emory university he was discharged and declared ebola free. two months later pressure built up in his eye the pain became unbearable and doctors found crozier still had the ebola virus still living in his eye. >> we know the eye is partitioned off from the body's immune system, that may be why ebola links in there. >> health watch dogs say even after the disease is thought to have exited their bodies, dr. crozier is unlikely to have spread ebola his tears and other eye membranes tested negative. nonetheless, health workers are asked to be extra cautious, when examining patients with ebola. whether the disease can be transmitted through sexual contact as can hiv. >> the inside of the testes are walled off which is why ebola has been detected in semen. >> mostly in liberia, sierra leone and guinea. but cases have been steadily declining since the peak and tomorrow liberia the hardest hit country is expected to declare itself ebola-free. >> while that is good news s