The European Commission called for 5,000 doctors on Wednesday, to be sent from EU states to combat west Africa's Ebola epidemic, said an European source with knowledge of the matter.
"The situation is too serious and it needs an immediate response," the source, who spoke on condition of anonymity, told AFP, adding that senior EU officials were in contact with national governments to mobilize the response.
"Thousands of other medical caregivers were also being called for," the source said.
"Positive responses," he added, without providing more details.
The source said the EU's Ebola coordinator, Christos Stylianides, was also reaching out to ministers, with more funds and logistic materials on the list of demands.
European officials were casting a wide net, asking for both medical staff directly from national authorities as well as volunteers operating through charities.
Earlier this month, Andriukaitis and Stylianides took part in a joint trip to the three worst hit West African countries: Sierra Leone, Liberia and Guinea.
Upon their return, the officials made an immediate call for epidemiologists to do more to diagnose and track the disease's progression.
The EU as a whole has so far mobilized more than one billion euros ($1.3 billion) for the fight against Ebola, including 373 million euros from the Commission, the EU's executive arm in Brussels.
Ebola has killed nearly 5,500 people and infected 15,351, mainly in west Africa, according to the latest figures from the World Health Organization.