In contrast, in the presence of PregS, ionic currents were mostly resistant to ononetin in NK cells from ME/CFS patients (Figures 2D–F) and post-COVID-19 condition patients (Figures 2G–I), and the I–Vs of ononetin currents in both groups did not show outwardly rectified and TRPM3-like currents (Figures 2E, H). Here, TRPM3 is linked to myalgic encephalomeyelitis/chronic fatigue syndrome.