Pneumonia

Pneumonia is an infection of the lungs that can make it hard for the oxygen you breathe to get into your bloodstream. Most cases of pneumonia are caused by bacteria or viruses, but pneumonia can also be caused by fungi.

The symptoms of pneumonia can range from mild to severe, and include cough, fever, chills, and trouble breathing. Many factors affect how serious a case of pneumonia is, including what caused the infection, the person’s age, and their overall health. Pneumonia can usually be treated successfully with antibiotic, antiviral, or antifungal medications, although full recovery can take weeks.

About a million adults receive hospital care for pneumonia each year, and the lung infection causes around 50,000 deaths annually. The people at highest risk for severe illness are infants and young children, adults age 65 years or older, and those with weakened immune systems.

A senior woman sitting in a wheelchair coughs, holding a closed hand in front of her mouth.

Related Articles

Free Healthbeat Signup

Get the latest in health news delivered to your inbox!

Sign Up
Harvard Health Publishing Logo

Thanks for visiting. Don't miss your FREE gift.

25 Gut Health Hacks is yours absolutely FREE when you sign up to receive health information from Harvard Medical School.

Sign up to get tips for living a healthy lifestyle, with ways to lessen digestion problems…keep inflammation under control…learn simple exercises to improve your balance…understand your options for cataract treatment…all delivered to your email box FREE.

Harvard Health Publishing Logo

Stay on top of latest health news from Harvard Medical School.

Plus, get a FREE copy of 25 Gut Health Hacks.

Harvard Health Publishing Logo

Stay on top of latest health news from Harvard Medical School.

Plus, get a FREE copy of 25 Gut Health Hacks.