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Illustration of hypersensitivity to salty taste. The cases with COVID-19 infection and taste deficiency showed hypersensitivity to NaCl concentrations lower than 0.0002 g/ml (0.0001, 0.00004 and 0.00002 g/ml). The number 1 in the Y-axis of the figure referred to 0.0002 g/ml of NaCl.∗∗∗ indicted to P < 0.0001.
