Identifying patients at highest risk from COVID-19: Guidance from the BMA GPs committee England on the list of at-risk patients and shielding arrangements.
British Lung Foundation: What is social shielding
CUH Rheumatology: COVID-19 Risk Advice for Patients on Immunosuppressant Drugs
Versus Arthritis: Calculating risk levels for patients
Renal Association: Risk Stratification