CD40LG and Ageusia: For instance, higher proportions of IgM+ patients were found in those with fever (71.9% vs 46.8%, p = 0.0008), ageusia (90.9% vs 46.3%, p < 0.0001), and anosmia (82.4% vs 47.4%, p = 0.005) (Fig 4 and S2 Table).