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Did you know?
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.
Did you know?
Liver spots have nothing whatsoever to do with the liver. They are a type of freckles commonly seen in older adults who have been out in the sun without sufficient sunscreen.
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There are approximately 3 million unintended pregnancies in the United States each year.
Did you know?
The horizontal fraction bar was introduced by the Arabs.
Did you know?
The average human gut is home to perhaps 500 to 1,000 different species of bacteria.