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A person working in a rice paddy in Asia becomes infected with the liver fluke by
Smoking
The inhalation of smoke from burning tobacco or other substances, often leading to addiction and various health risks.
Caffeine
A stimulant compound found in coffee, tea, and other beverages that affects the central nervous system.
Stimulants
Drugs that increase alertness, attention, and energy by elevating the levels of certain neurotransmitters in the brain.
Nicotine
A stimulant drug found in tobacco products that's addictive and can have both stimulating and calming effects.
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