Cumulative distribution functions of Lyα EW₀ as a function of the neutral hydrogen fraction, X_HI. Blue and orange circles represent the JWST samples at z = 7 from the EGS (Napolitano et al. 2024) and the UDS (this work) fields, respectively. The arrow represents the lower limit we could derive for EW₀ = 25 Å, due to incompleteness after Lyα slit loss correction. The DB17 sample at z = 6 (gray diamonds) is shown as a reference for the fully ionized Universe. Error bars were computed following Gehrels (1986). Data points have been slightly shifted in redshift for an easier visualization. The solid black line shows the best-fit exponentially declining function to the DB17 data, corresponding to a null X_HI value. Colored lines represent theoretical models derived from Dijkstra et al. (2011), which show the impact of an increasingly neutral IGM.