The CDC has updated the list of underlying medical conditions that increase risk of severe illness after reviewing published reports, pre-print studies, and various other data sources. CDC experts then determined if there was clear, mixed, or limited evidence that the condition increased a person’s risk for severe illness, regardless of age.
There was consistent evidence (from multiple small studies or a strong association from a large study) that specific conditions increase a person’s risk of severe COVID-19 illness:
Chronic kidney disease
COPD (chronic obstructive pulmonary disease)
Obesity (BMI of 30 or higher)
Immunocompromised state (weakened immune system) from solid organ transplant
Serious heart conditions, such as heart failure, coronary artery disease, or cardiomyopathies