Another person with a fever who came into contact with infected Spanish nursing assistant Teresa Romero before she was hospitalized on Oct. 6 was also sent to the same hospital, the Health Ministry said. Romero's condition, meanwhile, appeared to be improving, a ministry official said.
A missionary was transported to the hospital because he came down with a fever after returning to Spain from Liberia, where he treated Ebola patients, Spain's government said.
A fourth person, a Red Cross health worker who recently worked with Ebola patients in Sierra Leone, was hospitalized with a fever in Tenerife in the Canary Islands, officials said. Two roommates showing no symptoms were placed in hospital isolation as a precaution.
The Air France flight carrying 163 people was isolated after arriving from Paris in a remote part of Madrid's airport for disinfection.
Meanwhile, Danish authorities tested a medical worker who had been in West Africa.
Sweden said it would give an additional 100 million kronor ($14 million) to support Ebola fighting efforts, on top of $140 million ($19 million) pledged previously.
In Geneva, a World Health Organization official said the Ebola death toll will rise to more than 4,500 this week from among 9,000 people infected.