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Bacterial Infection

Doctor Decoded: What’s the Difference Between Viruses and Bacteria?

Lauren Smith, MASanjai Sinha, MD
Written by Lauren Smith, MA | Reviewed by Sanjai Sinha, MD
Updated on November 6, 2025
Reviewed by Sanjai Sinha, MD | November 6, 2025

It’s so common to lump viruses and bacteria together in the same breath that you might trick yourself into thinking they are the same thing. While both viruses and bacteria can cause infections in the body, they are very different germs with very different treatments.

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Lauren Smith, MA
Written by:
Lauren Smith, MA
Lauren Smith, MA, has worked in health journalism since 2017. Before joining GoodRx, she was the senior health editor and writer for HealthiNation.
Sanjai Sinha, MD
Reviewed by:
Sanjai Sinha, MD
Sanjai Sinha, MD, is a board-certified physician with over 20 years of experience. He specializes in internal medicine.

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