oronavirus pneumonia (COVID‐19)  Drug: bromhexine hydrochloride tablets, drug: arbidol hydrochloride granules, drug: recombinant human interferon α2b spray, drug: favipiravir tablets  China, novel coronavirus pneumonia 2019‐nCoV  60, all, 18–80  Treatment  Experimental: group A treatment group:
Bromhexine hydrochloride tablets, arbidol hydrochloride granules:
Standard treatment refers to the latest edition of pneumonia diagnosis and treatment scheme for novel coronavirus infection. Arbidol hydrochloride granules is recommended but not enforced