Radon is the second-leading cause of lung cancer, after smoking.

Worldwide, glaucoma is the second-leading cause of blindness after cataracts.

Homicide is the second-leading cause of death among youngsters.

For Canadians age 10 to 44, suicide is the second-leading cause of death after motor-vehicle accidents.

Cancer is still the second-leading cause of death in the U.S. behind heart disease.

Cervical cancer is the second-leading cause of death in women across the globe, affecting an estimated 470,000 women and killing 233,000 each year.

"Still, it's the second-leading cause of maternal death in this country."

"And yet now, homicide is the second-leading cause of death among Americans aged 15 to 25."

This year an estimated 37,000 men will die from the disease, making it the second-leading cause of cancer death in men.

For these youths, suicide has become the second-leading cause of death (after accidents).