Sierra Leone's six million citizens are being confined to their homes for three days as the West African nation launches a final push to stamp out Ebola.
Thousands of teams will fan out around the country from Friday, knocking on doors to remind people how Ebola is spread and how to prevent it.
In the hot spots - the regions around the capital and in the north - health workers will also search for undetected Ebola cases.
Alfred Palo Conteh, the head of Sierra Leone's Ebola response, says a major goal of the campaign is to fight complacency, more than a year after the outbreak was declared in West Africa.
Ebola has infected nearly 12,000 people in Sierra Leone.
