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Did you know?
Approximately 500,000 babies are born each year in the United States to teenage mothers.
Did you know?
Your heart beats over 36 million times a year.
Did you know?
Autoimmune diseases occur when the immune system destroys its own healthy tissues. When this occurs, white blood cells cannot distinguish between pathogens and normal cells.
Did you know?
There are over 65,000 known species of protozoa. About 10,000 species are parasitic.
Did you know?
The human body produces and destroys 15 million blood cells every second.