Australia (NSW Health)

 

  European Union (European Surveillance)

 

   Finland (KTL Departement of Epidemiology and Health Promotion)

 

   France (Institut national de la santè et de la rechèrche medicale))

 

   German (Robert Kock Institut)

 

   Irland (Health Protection Surveillance Centre)

 

   Mexico (Pan American Center For Sanitary ([Engineering and Environmental Sciences]).

 

   The Netherlands (R.I.V.M.)

 

   Norway (Folkehelsa)

 

   Portugal (Direcçao Geral da Saude)

 

   Spain (Centro National de Epidemiologia)

 

   Sweden (Smittskyddsinstitututet)

 

   United Kingdom (Public Health Laboratory Service)

 

   USA (Morbidity and Mortality Weekly Report)

 

   Who (Weekly Epidemiological Record)