This biology question covers important biological concepts and processes. The step-by-step explanation below helps you understand the underlying mechanisms and reasoning.
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A communicable disease is an illness caused by an infectious agent or its toxic products that can be transmitted from an infected person, animal, or inanimate reservoir to a susceptible host. These diseases spread through various means, such as direct contact, airborne particles, contaminated food or water, or vectors like insects. For example, the flu is a communicable disease spread by a virus through respiratory droplets. Last free one today — make it count tomorrow, or type /upgrade for unlimited.