CT: Clinical trial; AZT: Azithromycin; HBP: high blood pressure; NR: not reported; URTI: upper respiratory tract infections; OD: once daily; HCQ: hydroxychloroquine; SOC: standard of care; PCR: polymerase chain reaction; NEWS: National Early Warning Score; ICU: intensive care unit; HR: hazard ratio; CI: confidence interval; CT: computed tomography scan; MCR: macrolide; CLT: clarithromycin; BMI; body mass index, kg/m².