The National Academies: What You Need To Know About Infectious Disease

The National Academies

What You Need To Know About Infectious Disease


New infectious diseases are emerging and old ones are appearing in new places around the globe. What’s behind this trend? And to what extent has human behavior amplified the problem? The National Academies, advisers to the nation in science, engineering, and medicine, provide the information you need to understand this complex topic.



Microbes are all around us. Most don’t do any harm but what about the few that cause infection? Learn the basics.


Certain aspects of disease are a particular threat to us today. What are some of the things we're most concerned about in the United States?


Infectious disease isn’t limited by national borders. Learn how our modern way of life contributes to the spread and emergence of disease.


What do we need to do—as individuals and as a society—to stave off the threat of infectious disease?

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Infectious Disease Videos

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What You Need to Know About Infectious Disease

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What do you know about infectious disease?

Which are larger?

  • Correct!

    Bacteria are 10 to 100 times larger than viruses.

  • Sorry, that’s incorrect.

    Bacteria are 10 to 100 times larger than viruses.

Infectious Disease Defined


A type of virus that is responsible for causing upper respiratory tract infections in humans, otherwise known as the common cold.

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Disease Watchlist

Dengue Fever

Typically found in tropical areas, dengue fever is caused by four closely related dengue viruses. Humans contract the illness by being bitten by an infected mosquito.

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