The US authorities have added Mali to the countries whose passengers will face additional screening.
Enhanced measures will come into force today, the Centres for Disease Control (CDC) and the Department of Homeland Security said in a joint statement.
Mali will join Sierra Leone, Guinea and Liberia as countries from which passengers will face additional restrictions.
“The CDC recommended this measure because there have been a number of confirmed cases of Ebola in Mali in recent days, and a large number of individuals may have been exposed to those cases.”
Travellers will be subject to three weeks monitoring, which will include taking their temperature twice a day, watching out for symptoms such as fever and vomiting as well as liaising with the local medical authorities.