Table 1.
Symptoms collected by study site, study on effect of case definition on influenza vaccine effectiveness, VEBIS primary care multicentre case-control study, EU/EEA, 2022–23.
| Study site | Sudden onset of symptoms |
Systemic symptoms |
Respiratory symptoms |
Case definition for recruitment of patients for the VE study | ||||||
|---|---|---|---|---|---|---|---|---|---|---|
| Fever | Malaise | Headache | Myalgia | Cough | Sore throat | Shortness of breath | Coryza | |||
| Germany | x | x | x | x | x | x | x | EU ARI | ||
| Spain | x | x | x | x | x | x | x | x | EU ARI | |
| Croatia | x | x | x | x | x | x | x | x | x | EU ARI |
| Hungary | x | x | x | x | x | x | x | x | x | EU ARI |
| Ireland | x | x | x | x | x | x | x | x | EU ARI | |
| The Netherlands | x | x | x | x | x | x | x | x | x | EU ARI |
| Portugal | x | x | x | x | x | x | x | x | x | EU ARI |
| Romania | x | x | x | x | x | x | x | x | x | EU ARI |