The World Health Organisation has called for all passengers leaving Ebola stricken countries to submit to screenings.
Checks should be carried out at airports, seaports and all major land crossings in Guinea, Liberia, Nigeria and Sierra Leone.
All travelers to these countries are advised to seek medical attention at the first sign of illness, which includes fever, headache, sore throat, diarrhoea, vomiting, among other symptoms.
The WHO say there is no need for wider travel restrictions, but containment remains critical.
In Liberia, officials have admitted that 17 patients are missing after a raid on a clinic in the capital. The authorities have said they are confident they will eventually track them down, but admitted it is the greatest setback since the Ebola outbreak began.