Newcastle United manager Alan Pardew says the club are making provisions against the Ebola virus in preparation for the return of some players from international duty.
Cheick Tiote and Papiss Cisse both played African Cup of Nations qualifiers across the continent.
And Pardew said it would be "naive" of the club not to have concerns.
"They are essential to us and our doctor has looked into the problems that might arise," he said.
"We have a strategy for when they return and making sure they and their families are taken care of."
Tiote was part of the Ivorian side which played a double-header against DR Congo, while Cisse's Senegal faced Tunisia home and away.