Overview of background characteristics, disease burden, ambulatory care costs and Quality-of-life separately for all ILI patients and the ones clinically diagnosed as flu, according to type of health care used.

COM = community patients (not seeking professional medical care), AMB = ambulatory patients, HOSP = hospitalized patients, ILI = influenza-like illness, GP = general practitioner. For continuous variables mean (median) [minimum-maximum] are reported.$ranging from 1 up to 7 months pregnant (3 of them vaccinated against flu).|Minimum is 3: respondents were included only if they experienced at least 3 symptoms.#Absence from work, school and kindergarten: responses are matched according to age (kindergarten [0–3], school [2.5–18], and work [18 and older), to correct for misspecified responses (47 records, e.g. specifying absence from kindergarten, school ánd work for a sick child).