1. Centralised Information System for Infectious Diseases (CISID) web site. Accessible at: http://data.euro.who.int/CISID/
2. Decision No 2119/98/EC of the European Parliament and of the Council of 24 September 1998 setting up a network for the epidemiological surveillance and control of communicable diseases in the Community. Accessible at: http://eur-lex.europa.eu/smartapi/cgi/sga_doc?smartapi!celexapi!prod!CELEXnumdoc&lg=EN&numdoc=31998D2119&model=guicheti
3. European Medicine Agency web site. Accessible at: http://www.emea.europa.eu
4. EUVAC.NET web site. Accessible at: http://www.euvac.net/graphics/euvac/index.html
5. EUVAC.NET web site. Accessible at: http://www.euvac.net/graphics/euvac/vaccination/vaccination.html