Table 2 Protocol specificities between coordinating sites

5 health care district general hospitals

1 infectious disease hospital, 1 children’s city hospital, 1 children’s infectious disease hospital

1 infectious disease hospital

7 general hospitals

5 university hospitals

Emergency

Emergency and 3 selected wards

Paediatric, mixed, pregnancy, adults

Emergency and 7 selected wards

Emergency and >20 selected wards

Admission diagnosis associated with influenza infection; clinical symptoms of ILI

Clinical symptoms of ILI

Admission diagnosis associated with influenza inflection; clinical symptoms of ILI

Clinical symptoms of ILI

Signs of respiratory illness for <7 days

Full-time trained nurses

Doctors

Doctors, nurses, heads of wards

Doctors

Doctors, clinical researchers, nurses

Outside catchment area

-

-

-

Not affiliated with social security

2 consecutive weeks with ≥2 cases

Week with ≥5 laboratory-confirmed influenza cases using national surveillance data

Week with ≥5 laboratory-confirmed influenza cases using national surveillance data

Not defined^a

Defined by the national surveillance system

2 consecutive weeks with no cases

Week with no laboratory-confirmed influenza cases

Week with no laboratory-confirmed influenza cases

Not defined^a

Defined by the national surveillance system

2013-01 – 2013-15

2013-03 – 2013-22

2013-02 – 2013-21

2013-01 – 2013-14

2012-51 – 2013-16