Table. Dutch search terms retrieved from Google Trends and their English translation, Netherlands, 17 August 2013–4 August 2018 (n = 26 search terms).
| Dutch search term | English translation |
|---|---|
| Griep | Flu |
| Symptomen | Symptoms |
| Symptomen griep | Symptoms flu |
| De griep | The flu |
| Griep 2018a | Flu 2018a |
| Griep koorts | Flu fever |
| Griep 2016a | Flu 2016a |
| Koorts | Fever |
| Tegen griep | Against flu |
| Griep hoe lang | Flu how long |
| Griep 2015a | Flu 2015a |
| Griep 2017a | Flu 2017a |
| Griep heerst | Flu going around |
| Symptomen griep 2018a | Symptoms flu 2018a |
| Verkoudheid | Common cold |
| Hoe lang duurt griep? | How long does flu last? |
| Ziek | Ill |
| Griep 2014a | Flu 2014a |
| Griep hoofdpijn | Flu headache |
| Griep wat te doen | Flu what to do |
| Heerst er griep | Is there flu going around |
| Griep zwanger | Flu pregnant |
| Verschijnselen griep | Symptoms flu |
| Griep kind | Flu child |
| Griep spierpijn | Flu muscle strain |
| Griep hoesten | Flu cough |
a Terms with a year in them were removed from further analysis because they were unlikely to be useful predictors in any other year.