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Did you know?
Vaccines prevent between 2.5 and 4 million deaths every year.
Did you know?
A seasonal flu vaccine is the best way to reduce the chances you will get seasonal influenza and spread it to others.
Did you know?
Pregnant women usually experience a heightened sense of smell beginning late in the first trimester. Some experts call this the body's way of protecting a pregnant woman from foods that are unsafe for the fetus.
Did you know?
The horizontal fraction bar was introduced by the Arabs.
Did you know?
The ratio of hydrogen atoms to oxygen in water (H2O) is 2:1.