Vaccines prevent between 2.5 and 4 million deaths every year.
Did you know?
About 3% of all pregnant women will give birth to twins, which is an increase in rate of nearly 60% since the early 1980s.
Did you know?
It is difficult to obtain enough calcium without consuming milk or other dairy foods.
Did you know?
Bacteria have been found alive in a lake buried one half mile under ice in Antarctica.
Did you know?
Drugs are in development that may cure asthma and hay fever once and for all. They target leukotrienes, which are known to cause tightening of the air passages in the lungs and increase mucus productions in nasal passages.
Laboratory, Institute of Biochemistry, University of Cologne.
Students
Students rated their grandparents on a scale from 1 to 4 based on emotional closeness, time spent ...