This information is based on source information from the National Women's Health Information Center.
Cystic fibrosis is a hereditary metabolic disorder characterized by abnormal production of thick mucus. It primarily affects the pancreas and respiratory system and results in chronic infection.It’s estimated that 2,500 babies are born with cystic fibrosis each year and that more than 30,000 children and young adults in the United States currently have it.
From Good Kids, Bad Habits: The RealAge Guide to Raising Healthy Children by Jennifer Trachtenberg.

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Good Kids, Bad Habits: The RealAge Guide to Raising Healthy Children
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Important: This content reflects information from various individuals and organizations and may offer alternative or opposing points of view. It should not be used for medical advice, diagnosis or treatment. As always, you should consult with your healthcare provider about your specific health needs.