Fig. 3.

Case definitions decision tree. Legend: *respiratory symptoms are cough, expectoration, dyspnoea, pulmonary consolidation, chest pain; **other than acute neurological disease or arbovirosis, evident causes are soft tissue infection (including dental abscess, severe gum or mouth infection) or muscle infection, severe surgical condition or surgical abdomen, kidney or urinary tract infection, HIV Opportunistic Diseases (WHO, 2010b) and Acute Retroviral Syndrome. ARI, acute respiratory infection; AFDUC, acute febrile disease of unknown cause; GI, acute gastrointestinal infection