Betacoronavirus/isolation & purification; Coronavirus Infections/epidemiology; Otolaryngology/organization & administration; Pneumonia, Viral/epidemiology; COVID-19; Coronavirus Infections/complications; Coronavirus Infections/diagnosis; Coronavirus Infections/virology; Delivery of Health Care/organization & administration; Dysgeusia/diagnosis; Dysgeusia/etiology; Epistaxis/diagnosis; Epistaxis/etiology; Humans; Inflammation/complications; Inflammation/virology; Nasal Mucosa/pathology; National Health Programs/organization & administration; Olfaction Disorders/diagnosis; Olfaction Disorders/etiology; Pandemics; Periodicals as Topic; Personal Protective Equipment/standards; Pneumonia, Viral/complications; Pneumonia, Viral/diagnosis; Pneumonia, Viral/virology; SARS-CoV-2; United Kingdom/epidemiology