Question

What happens to the human
body when it gets a disease?

Answer 1

Answer:

A disease outbreak is the occurrence of disease cases in excess of normal expectancy. The number of cases varies according to the disease-causing agent, and the size and type of previous and existing exposure to the agent.

Disease outbreaks are usually caused by an infection, transmitted through person-to-person contact, animal-to-person contact, or from the environment or other media. Outbreaks may also occur following exposure to chemicals or to radioactive materials.

Answer 2

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Additional major chronic diseases are discussed in this chapter in the sections “Cancer” (cancers of all organs and tissues, including blood), “Neuroscience and Disorders of the Nervous System” (e.g., Parkinson's disease, Alzheimer's disease), “Autoimmune Diseases” (e.g., lupus, multiple sclerosis), and “Infectious ...