| Google Trends search volumes | (GTSV) |
| Seasonal Autoregressive Integrated Moving Average | (SARIMA) |
| World Health Organisation | (WHO) |
| Absolute monthly search volume | (AMSV) |
| Augmented Dickey–Fuller test | (ADF) |
| Akaike’s Information Criterion | (AIC) |
| Mean absolute percentage error | (MAPE) |