Ask unlimited questions for free
This year, an estimated 1.4 million Americans will have a new or recurrent heart attack.
The human body produces and destroys 15 million blood cells every second.
Vaccines prevent between 2.5 and 4 million deaths every year.
On average, someone in the United States has a stroke about every 40 seconds. This is about 795,000 people per year.
Aspirin may benefit 11 different cancers, including those of the colon, pancreas, lungs, prostate, breasts, and leukemia.
For a complete list of videos, visit our video library