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.
NHS England and NHS Improvement guidance on shielding and protecting people who are clinically extremely vulnerable from COVID-19.
British Lung Foundation: Shielding Guidance
British Thoracic Society: Risk Stratification – Respiratory
Versus Arthritis: Calculating risk levels for patients