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Diane Keaton's death on Saturday has sparked reminders of the risks of pneumonia.

The iconic actress, director and producer was 79 when she succumbed to the respiratory infection in California.

Keaton's family confirmed her cause of death to People magazine on Wednesday. Fox News Digital has reached out to her rep for comment.

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What is pneumonia?

Pneumonia is defined by Cleveland Clinic as an infection in the lungs caused by bacteria , viruses or fungi.

This can cause the lung tissue to swell and create a buildup of fluid or pus in the lungs.

Dr. Marc Siegel, clinical professor of medicine at NYU Langone Health and Fox News' senior medical analys

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