Complications Based Questions

Editor-In-Chief: C. Michael Gibson, M.S., M.D. [1]: Associate Editor(s)-in-Chief: Aisha Adigun, B.Sc., M.D.[2]Nuha Al-Howthi, MD [3]Gurmandeep Singh Sandhu,M.B.B.S.[4]

COVID-19 is a new disease and there is limited information regarding risk factors for severe illness. Based on currently available information and clinical expertise, older adults and people of any age who have serious underlying medical conditions might be at higher risk for severe illness from COVID-19.^[1]
Based on what we know now, those at high-risk for severe illness from COVID-19 are:
- People 65 years and older
- People who live in a nursing home or long-term care facility
People of all ages with underlying medical conditions, particularly if not well controlled, including:
- People with chronic lung disease or moderate to severe asthma
- People who have serious heart conditions
- People who are immunocompromised
  - Many conditions can cause a person to be immunocompromised, including cancer treatment, smoking, bone marrow or organ transplantation, immune deficiencies, poorly controlled HIV or AIDS, and prolonged use of corticosteroids and other immune weakening medications
- People with severe obesity (body mass index [BMI] of 40 or higher)
- People with diabetes
- People with chronic kidney disease undergoing dialysis
- People with liver disease

Information on COVID-19 evolves daily. Current known risk factors include but are not limited to underlying chronic conditions such as; lung disease, moderate to severe asthma, cardiac disease with complications, diabetes, or immunocompromising conditions.
Lymphocytopenia, increase in circulating neutrophils, increased AST, ALT, LDH, elevated C-reactive protein, and increased ferritin levels may all be associated with severe illness/disease from COVID-19^[2].

Smoking cigarettes can leave you more vulnerable to respiratory illnesses, such as COVID-19. For example, smoking is known to cause lung disease and people with underlying lung problems may have increased risk for serious complications from COVID-19, a disease that primarily attacks the lungs. Smoking cigarettes can also cause inflammation and cell damage throughout the body and can weaken your immune system, making it less able to fight off disease.

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