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A child with airway obstruction caused by foreign body jamming in the throat
Asthma and chronic obstructive pulmonary disease COPD, Asian woman using metered dose inhaler MDI.
X-ray of a persons lungs with a disease, pneumonia . Virus screening
Fluffy clouds float in a blue sky on a sunny day without any obstructions.
Real MRI scans of the head and brain. Magnetic resonance image scan of the brain showed obstructive triventricular hydrocephalus. Background on theme of science, medicine, neurology.

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