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What is the definition of pneumonia?

ANSWER

Pneumonia is an inflammation of the lungs. Symptoms are fever, chills, cough, chest pain, and trouble breathing. It's often caused by a viral or bacterial infection.

SOURCES:
CDC: "Key Facts about Antiviral Drugs and Influenza (Flu.)" 
MedicineNet web site: "Flu Glossary of Terms."
Stedman's Medical Dictionary, 27th Edition, 2000.

Reviewed by Carol DerSarkissian on May 19, 2019

SOURCES:
CDC: "Key Facts about Antiviral Drugs and Influenza (Flu.)" 
MedicineNet web site: "Flu Glossary of Terms."
Stedman's Medical Dictionary, 27th Edition, 2000.

Reviewed by Carol DerSarkissian on May 19, 2019

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What is the definition of vaccine?

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