| in the eyes | 3 | location |
| among other symptoms | 2 | other |
| dengue → cause → headache | 15 |
| dengue → be characterized by → headache | 3 |
| dengue → cause → severe headaches | 3 |
| negative | neutral | positive |
| 0.853 | 0.136 | 0.011 |
| Raw frequency | 21 |
| Normalized frequency | 0.513 |
| Modifier score | 0.800 |
| Perplexity | 250.345 |