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Infection occurs when an external organism enters and harms a person’s body. These organisms use the body of the individual to survive, reproduce and settle down. Advertisement Some infections are mild and go unnoticed, but some can be serious and life-threatening. For some infections, treatment has no effect. Infection can be spread through various means, …

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Typhoid fever is caused by ingestion of food or water infected with the bacteria Salmonella typhi, or by close contact with a person infected with this bacteria. Advertisement Signs and symptoms of typhoid usually include high fever, headache, abdominal pain, and constipation or diarrhea. Most people with typhoid fever begin to feel better within a …

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