What you need to know about pneumonia

Mary Lou Retton hospitalization raising questions about forms of illness
Olympic gold medalist Mary Lou Retton is in the intensive care unit battling what her daughter calls a rare form of pneumonia.
How can someone so seemingly healthy as a 55-year-old world class gymnast spiral into intensive care from pneumonia?
Dr Catherine Myers is a pulmonologist at Northwestern Medicine Canning Thoracic Institute.
She joined the WGN Evening News to talk about the risk, when to seek medical attention and how to protect ourselves against pneumonia.
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