The Trump administration has been negotiating agreements with dozens of individual countries. Public health experts say a global agreement would be far more effective.
The government said the risk to the British public from the disease was low. The current outbreak in Africa has spread widely across the continent, killing more than 5,000 people.
A photograph released by the Geneva University Hospitals shows paramedics carrying from a helicopter a woman who had been diagnosed with Ebola following her flight from Nigeria, on Monday.