Words to Know
bronchitis (brahn-KYE-tis)—an infection of the tubes that carry air into the lungs.
pneumonia (nuh-MOH-nyuh)—an infection of the lungs.
SIDS—short for sudden infant death syndrome. It’s when a baby younger than 1 year dies during sleep and doctors can’t figure out why.
wheeze (weez) or wheezing (weez-ing)—high-pitched whistling sound when breathing.
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