Investigators trying to track the early spread of HIV found HIV-infected blood samples from as early as 1956, in the blood of a widely traveled Norwegian sailor who died of immune deficiency.

Almost 1/3 of  the cancer deaths in the U.S. are linked to tobacco use.

In translational research, T2 refers to

Federal law prevents patient abandonment once medical care is initiated.

Birth defects may be caused by a  variety of environmental agents, called teratogens, which include some bacteria and viruses, various drugs, chemicals and radiation.

California’s “5-A-Day” campaign assumes that

In the mid 1960’s, over 42% of adults smoked.

The most common type of injury is poison

Cardiovascular disease and cancer are responsible for up to 25% of all causes of death in America.

If you are calculating the incidence of testicular cancer, your population-at-risk would be men, not women.