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Attention, chocolate lovers: You may not be able to help yourselves. Swiss and British scientists have linked the widespread love of chocolate to a chemical "signature" that may be programmed into our metabolic systems.
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Kissing bugs
Kissing bugs: Insect vectors (carriers) of the parasite (called Trypanosoma cruzi) which causes Chagas' disease (American trypanosomiasis). The reduviid bugs "kiss" people, especially babies, on the lips while they are asleep infecting them with their parasite. Over 20 million people in the Americas have Chagas disease. The parasite can also be transmitted by blood transfusion and cross the placenta during pregnancy to infect the fetus.