What term describes an illness that can be transmitted from one host to another?

The term that describes an illness that can be transmitted from one host to another is "infectious disease." Infectious diseases are caused by pathogenic microorganisms such as bacteria, viruses, parasites, or fungi and can spread from person to person through various means such as direct contact, airborne transmission, or through vectors like mosquitoes. This transmissible nature is a key characteristic that distinguishes infectious diseases from other types of diseases.

In contrast, genetic diseases are caused by abnormalities in an individual's DNA and are not spread through pathogens. Chronic diseases typically develop over a long period and are usually non-infectious, such as diabetes or heart disease. Noncommunicable diseases, similar to chronic diseases, cannot be transmitted between individuals and often result from lifestyle factors or genetic predispositions. Understanding the definitions and characteristics of these terms is essential for public health and epidemiological practices, as it informs strategies for prevention and control of diseases.