Back to Intro
Click 'Back to Intro' to return to the beginning of this section.

Topic Index

The Immune System

Common Infectious Diseases

Prevention of Infectious Diseases

Click on the links above to learn more about infectious diseases.

Picture of a model of a strand of DNA, magnified

© 2000-2025 The StayWell Company, LLC. All rights reserved. This information is not intended as a substitute for professional medical care. Always follow your healthcare professional's instructions.