Table 1.
Countries, type of reported data, and seasons included in the study
| Country | Data type | No. of seasons* | Seasons |
|---|---|---|---|
| Belgium | ILI weekly rates | 14 | 2000/2001–2013/2014 |
| Denmark | ILI weekly rates | 18 | 1996/1997–2013/2014 |
| Estonia | ILI weekly rates | 9 | 2005/2006–2013/2014 |
| Greece | ILI % of consultations | 10 | 2004/2005–2013/2014 |
| Hungary | ILI weekly rates | 11 | 2003/2004–2013/2014 |
| Ireland | ILI weekly rates | 14 | 2000/2001–2013/2014 |
| Israel | ILI weekly rates | 11 | 2003/2004–2013/2014 |
| Lithuania | ILI weekly rates | 9 | 2005/2006–2013/2014 |
| Luxembourg | ILI % of consultations | 11 | 2003/2004–2013/2014 |
| Norway | ILI weekly rates | 9 | 2005/2006–2013/2014 |
| Poland | ILI weekly rates | 13 | 2001/2002–2013/2014 |
| Portugal | ILI weekly rates | 17 | 1997/1998–2013/2014 |
| Romania | ILI weekly rates | 10 | 2004/2005–2013/2014 |
| Serbia | ILI weekly rates | 8 | 2006/2007–2013/2014 |
| Slovakia | ILI weekly rates | 8 | 2006/2007–2013/2014 |
| Spain | ILI weekly rates | 18 | 1996/1997–2013/2014 |
| Sweden | ILI weekly rates | 10 | 2000/2001–2002/2003, 2006/2007–2013/2014 |
| Switzerland (con) | ILI % of consultations | 18 | 1996/1997–2013/2014 |
| Switzerland (pop) | ILI weekly rates | 14 | 2000/2001–2013/2014 |
| The Netherlands | ILI weekly rates | 18 | 1996/1997–2013/2014 |
| United Kingdom (ENG) | ILI weekly rates | 18 | 1996/1997–2013/2014 |
| United Kingdom (NIR) | ILI weekly rates | 13 | 2001/2002–2013/2014 |
| United Kingdom (SCT) | ILI weekly rates | 11 | 1996/1997–2013/2014 |
| Albania | ARI weekly rates | 15 | 1999/2000–2013/2014 |
| France | ARI weekly rates | 18 | 1996/1997–2013/2014 |
| Kazakhstan | ARI weekly rates | 12 | 2002/2003–2013/2014 |
| Kyrgyzstan | ARI weekly rates | 9 | 2005/2006–2013/2014 |
| Romania | ARI weekly rates | 9 | 2005/2006–2013/2014 |
| Russian Federation | ARI weekly rates | 18 | 1996/1997–2013/2014 |
| Ukraine | ARI weekly rates | 18 | 1996/1997–2013/2014 |
ILI, influenza-like illness; ARI, acute respiratory infection.
*
Number of seasons available for the study.