Fig. 3.

The upper and lower rows respectively represent influenza A at the moving average of week 0–1 and week 0–3. The estimates (dark gray line) and 95% confidence intervals (light gray shade) of adjusted predictions from the short-lag time models with natural cubic splines are presented. For non-linearly associated weather factors, piecewise regressions (black solid line) are additionally applied. The vertical dotted lines present the break points.