ECDC will work closely with the 27 EU Member States, but also with the EEA/EFTA countries (Norway, Iceland and Liechtenstein), candidate countries (Croatia, Former Yugoslav Republic of Macedonia and Turkey) and potential candidate countries (Albania, Bosnia and Herzegovina, Serbia and Montenegro, and Kosovo under UN Security Council Resolution 1244).
ECDC bo tesno sodeloval s 27 državami članicami in državami EGP/EFTA (Norveška, Islandija in Lihtenštajn), državami kandidatkami (Hrvaška, Nekdanja jugoslovanska republika Makedonija in Turčija) ter možnimi državami kandidatkami (Albanija, Bosna in Hercegovina, Srbija in Črna gora, Kosovo v skladu z Resolucijo 1244 Varnostnega sveta ZN).