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Did you know?
The immune system needs 9.5 hours of sleep in total darkness to recharge completely.
Did you know?
There are more bacteria in your mouth than there are people in the world.
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There are over 65,000 known species of protozoa. About 10,000 species are parasitic.
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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?
The lipid bilayer is made of phospholipids. They are arranged in a double layer because one of their ends is attracted to water while the other is repelled by water.
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