The head of the UN's Ebola mission has compared the disease in Sierra Leone to "a bush fire raging out of control".
But the country's president, Ernest Bai Koromo, has told ITV News in a rare interview that his government is "getting a grip" on the deadly virus.
ITV News Correspondent Dan Rivers reports from Freetown, Sierra Leone:
Workers tackling Ebola in Sierra Leone are concentrating on changing burial traditions in an attempt to stem the spread of the disease.Read the full story ›
Britain's response to the spread of Ebola in west Africa stepped up as a team of 120 army medics touched down in Sierra Leone.
They join 40 British soldiers already deployed there - with many more due to arrive next month.
As the World Health Organisation confirmed the number of recorded deaths from the virus will pass 4,500 this week, ITV News Correspondent Dan Rivers reports on the crisis in Africa:
British army medics have arrived in Sierra Leone to provide medical support in the fight against the Ebola epidemic in west Africa.
Around 120 troops have been engaging in exercises to simulate the conditions they will face in Sierra Leone.
Around 750 British troops are expected to be deployed to Sierra Leone over the coming months as part of the country's response to the outbreak of the potentially deadly virus.
More than 100 British personnel are arriving in Sierra Leone to combat the Ebola outbreak in West Africa. Here's what else the UK is doing.Read the full story ›
Oxfam has called for a greater focus on the prevention of new Ebola cases in West Africa in addition to managing existing cases and fatalities.
The charity says that many new Ebola cases are due to a "lack of access to basic washing facilities or because of their lack of knowledge about how the disease is spread".
It plans to triple its programmes in Sierra Leone and Liberia to provide water and hygiene and sanitation supplies, as well as public awareness campaigns.
We must break the chain of infection by equipping people with the means to protect themselves from contracting this deadly disease in the first place.
Sierra Leone has seen one of the most deadly days since the start of the Ebola outbreak after 121 people died and scores of new infections were diagnosed yesterday.
The figures, which covered the period through Saturday, put the total number of deaths at 678, up from 557 the day before. The daily statistics compiled by Sierra Leone's Emergency Operations Centre also showed 81 new cases of the hemorrhagic fever.
At least 56 new cases and 92 bodies have been discovered in Sierra Leone's Ebola lock down.
There is a "very strong possibility" the national curfew will be extended beyond the scheduled finish later today, an emergency official has said.
Sierra Leone is staging a three-day lockdown aimed at stemming the worst Ebola epidemic on record.