Underlying medical conditions Cancer (current diagnosis), Cardiac, cardiovascular, and cerebrovascular disorders (including heart disease, coronary artery disease, and hypertension or high blood pressure), Chronic Kidney Disease, Chronic respiratory disorders (including cystic fibrosis, moderate to severe asthma, pulmonary fibrosis, and chronic obstructive pulmonary disease/emphysema [COPD]), Diabetes (Type 1 and Type 2), Disability: physical, developmental, visual, hearing, or mental, Neurologic conditions (including dementia), Down Syndrome, Immunocompromised state (weakened immune system) including from blood or bone marrow transplant, immune deficiencies, HIV, use of corticosteroids, or use of other immune weakening medicines, Liver disease (including hepatitis), Pregnancy, Obesity: BMI ≥30 kg/m2, Schizophrenia spectrum disorders, Sickle Cell Disease, Thalassemia, persons with disabilities