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Some produce toxins, while others invade cells or tissues and then produce toxins. Even when localized in the body, such infections can have systemic effects. Symptoms are often a result of the body over-reacting in its own defence.

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14y ago
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12y ago

The pathogens have DNA or RNA that mixes in with your DNA which causes the illness and makes more pathogens. They need a host to survive because they feed of your body.

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Q: How do pathogens cause disease?
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