Ruibing Lyu et al. conducted clinical research on 63 patients receiving conventional therapy in combination with LHQWC (treatment group) and 38 patients receiving only conventional therapy (control group). Clinical data were collected 10 days after the treatment. A comparison between the two groups was performed in terms of disappearance rates of cardinal symptoms (fever, cough, and weakness), duration of fever and disappearance rates of other individual symptoms and signs. The disappearance rates of fever, cough, and weakness in the treatment group were 86.7%, 55.6%, and 82.5%, respectively, which were higher than those in the control group (67.7%, 30.6%, and 58.6%; p < 0.05). The median duration of fever was 6 days in patients in the treatment group and 7 days in the control group. There was no statistically significant difference between the groups (p = 0.171). The disappearance rates of short breath and moist crackles (68.2% and 56.0%) were higher than those in the control group (20.0% and 20.0%, p < 0.05). There were four cases of aggravation in the treatment group (6.4%) and six cases in the control group (15.8%), with no statistically significant difference (p > 0.05). There were no obvious adverse reactions in the treatment group (Lyu et al., 2020).