Underlying Medical Conditions
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Asthma (moderate-to-severe)
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Cerebrovascular Disease (affects blood vessels and blood supply to the brain)
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COPD (Chronic Obstructive Pulmonary Disease)
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Diabetes Mellitus (type 1 and type 2)
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Heart Conditions, such as Heart Failure, Coronary Artery Disease, or Cardiomyopathies
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Immunocompromised State (weakened immune system)
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Pulmonary Fibrosis (having damaged or scarred lung tissues)
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Thalassemia (a type of blood disorder)