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Did you know?
Malaria was not eliminated in the United States until 1951. The term eliminated means that no new cases arise in a country for 3 years.
Did you know?
The human body produces and destroys 15 million blood cells every second.
Did you know?
The immune system needs 9.5 hours of sleep in total darkness to recharge completely.
Did you know?
After a vasectomy, it takes about 12 ejaculations to clear out sperm that were already beyond the blocked area.
Did you know?
Bacteria have been found alive in a lake buried one half mile under ice in Antarctica.