Signs of pneumonia include a high fever, chills, shortness of breath, and a deep cough that doesn’t go away.
If you’re older, have other health problems, or your pneumonia is serious, your lungs may not work the way should. If they don’t, you may not have enough oxygen in your blood, which your brain, muscles, and other organs need.
Your doctor can find out if this is the case with a blood test or a sensor on your finger. You may need to get more oxygen through a breathing mask, or possibly use a machine to help you breathe -- called a ventilator -- until your lung heals.
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