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Cancer has been around as long as humankind, but only in the second half of the twentieth century did the number of cancer cases explode.
Everyone has one nostril that is larger than the other.
There are more bacteria in your mouth than there are people in the world.
When taking monoamine oxidase inhibitors, people should avoid a variety of foods, which include alcoholic beverages, bean curd, broad (fava) bean pods, cheese, fish, ginseng, protein extracts, meat, sauerkraut, shrimp paste, soups, and yeast.
Vaccines cause herd immunity. If the majority of people in a community have been vaccinated against a disease, an unvaccinated person is less likely to get the disease since others are less likely to become sick from it and spread the disease.