COVID-19(6) Taste.(2) Ramsay Hunt syndrome(2) Neutrophil-to-lymphocyte ratio(2) Smell(2) recovery.(2) medical staff protection(1) Sublingual immunotherapy(1) no significant differences(1) olfactory loss(1) rhinitis(1) Immunotherapy(1) recovery(1) Occurrence(1) reduced(1) Adverse reactions(1) Total(1) clinical effectiveness(1) allergic rhinitis(1) olfactory dysfunction(1) reduction(1) Smell.(1) different time points(1) Coronavirus disease 2019(1) Sinonasal undifferentiated carcinoma(1) effective(1) Symptom(1) recruited(1) different time point(1) IgE(1)