TRPM3 and COVID-19: Subsequently, we proposed in the present study to achieve two different aims: (i) validate impaired TRPM3 ion channel function in post-COVID-19 condition compared with ME/CFS using fresh isolated cells (baseline), and (ii) investigate NTX effects on TRPM3 channel function in NK cells from post-COVID-19 condition participants after incubation of non-treated and NTX-treated cells.