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Table 1 List of symptoms collected by Influenza-like Illness (ILI) tracking systems: Influenzanet, FluTracking, Reporta and Flu Near You

From: Public health for the people: participatory infectious disease surveillance in the digital age

Symptom Influenzaneta FluTracking Reporta Flu Near You
Fever
Cough
Sore throat  
Shortness of breath  
Chills/night sweats   
Fatigue   
Nausea/vomiting  
Diarrhea  
Body aches/Muscle pain  
Headache  
Runny or blocked nose    
Sneezing    
Chest pain    
Loss of appetite    
Colored sputum/phlegm    
Watery/bloodshot eyes    
Stomach ache    
Irritation     
Joint pain     
Weakness     
  1. aInfluenzanet has an extensive symptom questionnaire and not all of the information collected by this questionnaire is listed in Table 1. A complete list of questions can be obtained from the “Methods” section of influenzanet.eu.