Liberia was declared free from Ebola by the government and the World Health Organisation (WHO) on Saturday after 42 days without a new case of the virus, which killed more than 4,700 people there during a year-long epidemic.
Former Sierra Leone Vice-President Samuel Sam-Sumana, who was fired by the president in March, petitioned the Supreme Court on Thursday to block his replacement from carrying out his duties pending a final ruling on the legality of his dismissal.
Four Americans who may have been exposed to the deadly Ebola virus in Sierra Leone have arrived in the United States and are being observed at the University of Nebraska Medical Center, the hospital said on Sunday.