Which type of diseases does the term extrinsic diseases refer to?

The term extrinsic diseases typically refers to diseases that are caused by external factors, such as infectious agents or environmental influences. In this context, contagious diseases that can spread from person to person fall under this category because they are not inherent to an individual's genetic makeup but rather due to exposure to pathogens like bacteria or viruses. This misinformation or external introduction can lead to outbreaks and transmission within communities, making them classified as extrinsic.

Other options denote different types of diseases; for instance, inherited diseases involve genetic factors that are passed down through generations, whereas non-contagious lifestyle diseases arise from personal choices such as diet or exercise and do not spread from one individual to another. Viruses that cannot be transmitted, while a specific focus, do not align with the concept of extrinsic as they are not diseases caused by external environmental factors affecting multiple hosts.