CLEVELAND, Aug. 14 (UPI) — Four out of five mothers of pre-teens and teenagers know their children need additional vaccines, a U.S. survey indicated.

ATLANTA, Aug. 14 (UPI) — Four patients at an Arizona hospital were incorrectly diagnosed with Legionnaires’ disease last year because of un-sterilized ice, health officials said.

MONTREAL, Aug. 13 (UPI) — A national tobacco use monitoring survey found 18 percent of Canadians age 15 or older were active smokers in 2008, Canadian Cancer Society officials said.

EAST LANSING, Mich., Aug. 13 (UPI) — A molecular discovery could help scientists move closer to finding an “off switch” for cancer, U.S. researchers say.

ATLANTA, Aug. 13 (UPI) — Doctors should ask patients if they are taking herbal supplements because of potential interaction with medications, U.S. health officials advise.

TAMPA, Fla., Aug. 13 (UPI) — U.S. researchers say they have linked oxygen treatment during surgery to hastened memory loss in mice.

SYDNEY, Aug. 13 (UPI) — Magnetic resonance imaging may do early breast cancer patients more harm than good, a review by Australian and U.S. researchers suggests.

GRAND RAPIDS, Mich., Aug. 13 (UPI) — Significant battles have been won in the war on cancer, but it is unappreciated by the public because of the way it is reported, U.S. researchers said.

COLUMBUS, Ohio, Aug. 13 (UPI) — A greater proportion of severe injuries in high school football occur during kickoffs and punt plays, U.S. researchers find.

SEATTLE, Aug. 13 (UPI) — Home canning, fueled by movements to eat more fruits and vegetables, save money and eat locally, is gaining favor among younger people, a Seattle Web site says.