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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?
Human neurons are so small that they require a microscope in order to be seen. However, some neurons can be up to 3 feet long, such as those that extend from the spinal cord to the toes.
Did you know?
Vaccines prevent between 2.5 and 4 million deaths every year.
Did you know?
The average adult has about 21 square feet of skin.
Did you know?
There are more bacteria in your mouth than there are people in the world.


