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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?
HIV testing reach is still limited. An estimated 40% of people with HIV (more than 14 million) remain undiagnosed and do not know their infection status.
Did you know?
Vaccines prevent between 2.5 and 4 million deaths every year.
Did you know?
If all the neurons in the human body were lined up, they would stretch more than 600 miles.
Did you know?
Acetaminophen (Tylenol) in overdose can seriously damage the liver. It should never be taken by people who use alcohol heavily; it can result in severe liver damage and even a condition requiring a liver transplant.