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A vector is an organism, often an insect, that transmits pathogens or parasites from one host to another, playing a crucial role in the spread of diseases. In contrast, a pest refers to any organism that is considered undesirable or harmful in a specific context, often causing damage to crops, livestock, or human health. While all vectors can be pests, not all pests act as vectors; some may simply cause harm without transmitting diseases. Thus, the primary difference lies in their roles: vectors facilitate disease transmission, while pests are generally defined by their negative impact on human activities or health.

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1d ago

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