This website is part of the ECDC (European Centre for Disease Prevention and Control) network



Factsheet for health professionals

Influenza is an infectious disease that primarily presents with respiratory signs and symptoms, caused by RNA viruses. The most significant impacts of influenza viruses on humans are those arising from the influenza A strains.

Q&A on avian influenza
What is avian influenza (bird flu)? Why are we concerned about bird flu outbreaks?...





Click a letter to find the health topic
© European Centre for Disease Prevention and Control (ECDC) 2005 - 2015