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Our Lung HelpLine is answering questions about COVID-19. Contact our Lung HelpLine by calling 1-800-LUNGUSA or submitting a question online.

What Is COVID-19

COVID-19, short for COronaVIrus Disease 2019, is a respiratory illness caused by a novel coronavirus first detected in China in late 2019. Early transmission of the coronavirus was linked to an animal market, suggesting animal-to-person infection. By January 2020, with the spread of coronavirus disease to over 100 other locations, including the U.S., the World Health Organization (WHO) officially declared the outbreak a public health emergency and later, a pandemic. Only months later, confirmed cases of COVID-19 have been recorded in almost every country around the world.

How It Affects Your Body

The lungs are the first body organ affected by COVID-19. In the early days of an infection, the novel coronavirus rapidly invades cells in our lungs. COVID-19 is thought to attack the epithelial cells lining the airways—that catch and clear out things like pollen and viruses—flooding our airways with debris and fluids.

People who become sick with COVID-19 may experience mild to severe disease. Symptoms, such as cough and shortness of breath, can come on suddenly. Severe illness may cause a number of complications that require medical intervention, including:

  • Pneumonia
  • Acute respiratory distress syndrome
  • Cardiac disease
  • Blood clots
  • Kidney disease
  • Organ failure

COVID-19 can be fatal for anyone, though the greatest percentage of individuals who die are over the age of 65 and living with a chronic disease.

Watch this video from The New York Times that shows how coronavirus attacks the body.

People at Higher Risk for Severe Illness

The novel coronavirus has never before been seen in humans so we have no immunity to it and everyone is at risk of becoming infected with the virus that causes COVID-19. Some individuals, such as healthcare professionals and those caring for people sick with COVID-19, are more likely to get infected than others.

Anyone can have mild to severe symptoms from COVID-19. There are some individuals who are at higher risk for severe illness. Based on current information:

  • Risk increases as you age so the older you are, the higher your risk
  • People of all ages with underlying medical conditions, particularly if not well controlled, including:
    • People with chronic obstructive pulmonary disease (COPD).
    • People who are immunocompromised from solid organ transplantation.
  • People with severe obesity (body mass index [BMI] of 30 or higher)
  • Other medical conditions including serious heart conditions, type 2 diabetes, sickle cell disease and people with chronic kidney disease.

As of June 25, 2020, the CDC lists people with chronic health conditions that might be at an increased risk of severe illness. Some of the listed conditions include: moderate-to-severe asthma, pulmonary fibrosis, smoking or being in an immunocompromised state from use of corticosteroids or other immune weakening medicines.

The American Lung Association is closely following reports issued by the Centers for Disease Control and Prevention (CDC) and will help relay important public health information provided by the agency. We encourage you to follow along for all in-the-moment updates.
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Page last updated: July 28, 2020

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