Table 2

Questions asked about symptoms of ILI

-No symptoms?

Cough?

-Running nose?

Headache?

-Sore throat?

Chest pain?

-Muscle pain?

Diarrhea?

-Abdominal pain?

Cold shivers?

-Nausea

Irritated eyes?

-Sudden fever? (No/yes/don't know)

-How high was the fever? (37C/between 37C and 40C, in steps of 0.5 degree)


Definition of ILI: Fever >38C, that started suddenly, plus headache or muscle pain, plus at least one of the respiratory symptom: running nose/coughing/sore throat/chest pain

Marquet et al. BMC Public Health 2006 6:242   doi:10.1186/1471-2458-6-242

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