US (GDP $16.24tn) The US has committed $350m with the department of defence prepared to spend more than $1bn to control the outbreak.
"We are not going to get to zero risk no matter what we do, unless and until we control the outbreak in west Africa," he said on Saturday.
The World Health Organisation dispatched a team to the city yesterday to help control the outbreak before the Chinese new year on 22 January, when the government estimates 1.9bn journeys will be made around China and overseas.
But in El Salvador the challenge is exacerbated by tottering public institutions, high rates of sexual violence, inadequate sex education and a backdrop of violence and gang warfare which are undermining efforts to control the outbreak.
In addition to warning people to wear long clothing, stay within screened areas and use insect repellents, health officials are trying to control the outbreak by decreasing the number of breeding sites in stagnant water and discarded containers.
Unable to control the outbreak of the Norwalk virus, Holland America is taking the ship out of service for 10 days to disinfect it when it docks on Thursday at Port Everglades in Fort Lauderdale.
South Korea confirmed its sixth case of bird flu on Saturday despite the culling of poultry after earlier cases, raising concerns that quarantine measures had failed to control the outbreak.
"Abertawe Bro Morgannwg University Health Board officers are working hard with Public Health Wales officers to investigate and control the outbreak and enhanced infection control measures have been taken".
This morning, BBC 4's Today Programme carried an interview with Lewis Brown, the embattled Liberian Minister for Information, in which he spelled out the extreme measures being considered to control the outbreak.
The country, which is home to one of Al Qaeda's most active branches, has been unraveling through loss of central government control, the outbreak of war in several cities and a severe economic crisis.
Only 50 miles (80km) of sea separate Haiti from Cuba, which has sent hundreds of doctors to help the Haitians control the outbreak (and who may inadvertently have brought the illness back).
