Two patients were admitted to the hospital. Patient one was diagnosed with salmonella poisoning, and patient two had West Nile. Which best describes their sicknesses?

Salmonella poisoning is commonly acquired by eating food contaminated with Salmonella bacteria, so patient one contracted the sickness from contaminated materials. West Nile virus is typically transmitted to people through the bite of an infected mosquito, which is an animal vector. Therefore, choice C best describes how each patient contracted the sickness.

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