2019-20 coronavirus outbreak Coronavirus disease 2019 (COVID-19) business.industry SARS-CoV-2 Severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) medicine.medical_treatment Public Health, Environmental and Occupational Health COVID-19 ACE2 Disease cluster Virology Renal Dialysis familial cluster medicine Humans Hemodialysis Angiotensin-Converting Enzyme 2 business Letter to the Editor