TABLE 1.
Overview of sites and number of subjects (cases and controls) per site and setting in the 2018/2019 and 2019/2020 influenza seasons DRIVE data
| Number of subjects (%) | |||||||
|---|---|---|---|---|---|---|---|
| Season 2018/2019 | Season 2019/2020 | ||||||
| Country | Site name | Children 6 m to 17y | Adults 18–64y | Older adults ≥65y | Children 6 m to 17y | Adults 18–64y | Older adults ≥65y |
| Primary care (ILI a ) | |||||||
| Austria | Medical U Vienna | 432 (21) | 422 (21) | 33 (8) | 639 (27) | 673 (30) | 47 (14) |
| Italy | CIRI‐IT GP network | 384 (19) | 520 (26) | 190 (45) | 698 (29) | 524 (23) | 146 (42) |
| Italy | ISS | 1149 (57) | 1022 (50) | 178 (42) | 938 (40) | 863 (38) | 119 (34) |
| England | RCGP | 45 (2) | 72 (4) | 20 (5) | 97 (4) | 185 (8) | 35 (10) |
| Total | 2010 | 2036 | 421 | 2372 | 2245 | 347 | |
| Hospital (SARI b ) | |||||||
| Finland | Helsinki UH, Jorvi H | ‐ | 103 (9) | 171 (8) | ‐ | 56 (5) | 69 (4) |
| France | I‐REIVAC | ‐ | ‐ | ‐ | ‐ | 134 (13) | 246 (15) |
| Italy | CIRI‐IT BIVE | 820 (51) | 278 (25) | 500 (23) | 770 (55) | 296 (28) | 584 (35) |
| Romania | IBI Matei Bals | 518 (32) | 356 (33) | 153 (7) | 500 (36) | 221 (21) | 78 (5) |
| Spain | FISABIO | 187 (12) | 234 (21) | 1099 (50) | 19 (1) | 157 (15) | 486 (29) |
| Spain | Germans Trias i Pujol UH | ‐ | ‐ | ‐ | 25 (2) | 68 (6) | 89 (5) |
| Spain | La Paz UH | ‐ | ‐ | ‐ | ‐ | 15 (1) | 21 (1) |
| Spain | Vall d'Hebron UH | 70 (4) | 124 (11) | 271 (12) | 78 (6) | 110 (10) | 100 (6) |
| Total | 1595 | 1095 | 2194 | 1392 | 1057 | 1673 | |
Note: BIVE: Italian Hospital Network; CIRI‐IT: Interuniversity Research Center on Influenza and other Transmissible Infections; GP: General Practitioner; FISABIO: Foundation for the Promotion of Health and Biomedical Research of the Valencia Region; H: hospital; I‐REIVAC: Innovative Clinical Research Network In Vaccinology; IBI Matei Bals: National Institute for Infectious Diseases “Prof. Dr. Matei Balş”; ILI: influenza‐like illness; ISS: Italian National Institute of Health; RCGP: Royal College of General Practitioners Research and Surveillance Centre; SARI: severe acute respiratory infection; U: University; UH: University Hospital.
ILI was defined as an individual presenting with sudden onset of symptoms; AND at least one of the following systemic signs or symptoms: fever/feverishness, malaise, headache, and myalgia; AND at least one of the following respiratory symptoms: cough, sore throat, and shortness of breath.
SARI was defined as a hospitalized person with a suspicion of infection with at least one of the systemic signs or symptoms defined above or deterioration of general condition; AND at least one of the respiratory symptoms defined above, at admission or within 48 h after admission.