* known hypersensitivity to any macrolide including azithromycin, ketolide antibiotic, or the excipients including an allergy to soya or peanuts. * known fructose intolerance, glucose-galactose malabsorption or sucrose-isomaltase-insufficiency * currently on a macrolide antibiotic (clarithromycin, azithromycin, erythromycin, telithromycin, spiramycin) * on any ssri (selective serotonin reuptake inhibitor) * elevated cardiac troponin at initial assessment suggestive of significant myocarditis (if clinically the clinical team have felt it appropriate to check the patient's troponin levels) * evidence of qtc prolongation: qtc\>480ms * significant electrolyte disturbance (e.g. hypokalaemia k+\<3.5 mmol/l) * clinically relevant bradycardia (p\<50 bpm), non-sustained ventricular tachycardia or unstable severe cardiac insufficiency * currently on hydroxychloroquine or chloroquine

* known hypersensitivity to any macrolide including azithromycin, ketolide antibiotic, or the excipients including an allergy to soya or peanuts. * known fructose intolerance, glucose-galactose malabsorption or sucrose-isomaltase-insufficiency * currently on a macrolide antibiotic (clarithromycin, azithromycin, erythromycin, telithromycin, spiramycin) * on any ssri (selective serotonin reuptake inhibitor) * elevated cardiac troponin at initial assessment suggestive of significant myocarditis (if clinically the clinical team have felt it appropriate to check the patient's troponin levels) * evidence of qtc prolongation: qtc\>480ms * significant electrolyte disturbance (e.g. hypokalaemia k+\<3.5 mmol/l) * clinically relevant bradycardia (p\<50 bpm), non-sustained ventricular tachycardia or unstable severe cardiac insufficiency * currently on hydroxychloroquine or chloroquine

- known hypersensitivity to any macrolide including azithromycin, ketolide antibiotic, or the excipients including an allergy to soya or peanuts. - known fructose intolerance, glucose-galactose malabsorption or sucrose-isomaltase-insufficiency - currently on a macrolide antibiotic (clarithromycin, azithromycin, erythromycin, telithromycin, spiramycin) - on any ssri (selective serotonin reuptake inhibitor) - elevated cardiac troponin at initial assessment suggestive of significant myocarditis (if clinically the clinical team have felt it appropriate to check the patient's troponin levels) - evidence of qtc prolongation: qtc>480ms - significant electrolyte disturbance (e.g. hypokalaemia k+<3.5 mmol/l) - clinically relevant bradycardia (p<50 bpm), non-sustained ventricular tachycardia or unstable severe cardiac insufficiency - currently on hydroxychloroquine or chloroquine

- known hypersensitivity to any macrolide including azithromycin, ketolide antibiotic, or the excipients including an allergy to soya or peanuts. - known fructose intolerance, glucose-galactose malabsorption or sucrose-isomaltase-insufficiency - currently on a macrolide antibiotic (clarithromycin, azithromycin, erythromycin, telithromycin, spiramycin) - on any ssri (selective serotonin reuptake inhibitor) - elevated cardiac troponin at initial assessment suggestive of significant myocarditis (if clinically the clinical team have felt it appropriate to check the patient's troponin levels) - evidence of qtc prolongation: qtc>480ms - significant electrolyte disturbance (e.g. hypokalaemia k+<3.5 mmol/l) - clinically relevant bradycardia (p<50 bpm), non-sustained ventricular tachycardia or unstable severe cardiac insufficiency - currently on hydroxychloroquine or chloroquine