I guess the concept is happy -- the public urging for our world's policy makers to make cancer a top priority -- but the fact that becomes all too apparent on this World Cancer Day is quite sobering. More than seven million people die from cancer and close to 11 million new cases are diagnosed worldwide each year. In 2006, cancer killed more people than AIDS, malaria, and tuberculosis combined.

So today is both happy and sad. But for now, let's focus on the happy.

The Geneva-based International Union Against Cancer (UICC) and member organizations in 86 countries are launching a five-year campaign to impart life lessons to children so they can prevent cancer later in life. Parents are critical in this campaign and must take an active role in teaching their children techniques for saving their lives.

Forty-three percent of cancer cases can be prevented through healthy lifestyles that begin in childhood. The World Cancer Campaign slogan -- Today's Children, Tomorrow's World -- underscores the possibility that a concerted effort among world leaders, parents, and their children can make a real difference through four key actions -- providing a smoke-free environment for children; ensuring children keep physically active, eat a healthy diet, and avoid obesity; educating children about vaccines for virus-related liver and cervical cancers; and limiting children's exposure to the sun.

Former First Lady Barbara Bush, Her Royal Highness Lalla Slama of Morocco, Nigerian President Olusegun Obasanjo, and tennis star Steffi Graf are some of the powerful voices powering this campaign that UICC president Dr. Franco Cavalli says can save so many lives if embraced by those at the highest decision-making levels.

"Complacency and inaction on the part of world community will effectively contribute to more than 10 million deaths every year by 2020," he said.

Americans are urged to know their family medical histories -- and to share them with their doctors.

Spearheaded by the U.S. surgeon general's office and other public and private agencies, this urging is critical -- because knowledge of family history can lead to more frequent and earlier screenings for particular cancers, to changes in diet and exercise to combat onset of heart disease and diabetes, to more formal genetic counseling and testing if warranted.

This Thanksgiving marked the third anniversary of Thanksgiving National Family History Day, a day the surgeon general's office has reserved for family discussion and documentation of medical histories.

"Family history itself is the first and best genetic test," says Sharon Terry, president of Genetic Alliance, a non-profit group in Washington, D.C.

Brigham and Women's Hospital in Boston has started a work-place initiative regarding medical family history. In the past year, about half of the 13,000 employees -- from physicians to file clerks -- have completed the computerized family history forms developed by the surgeon general's office.

Acting surgeon general Kenneth Moritsugu says, "knowing your family history can help you make better health choices. Much of what we do in American health care is treat chronic diseases, many of which involve choices over a lifetime."

In the United States, mammograms are not recommended for women under the age of 40. Other then an annual check-up and a monthly self breast exam, young women with no family history of breast cancer have no medical tools available for preventing and detecting the disease. But no woman is immune to this disease -- and being female is the single most important risk factor for diagnosis. And young women do get breast cancer. I did. And so did Sharon Rutherford, a 36-year-old Ulster woman who was diagnosed in December.

Rutherford is urging health officials to lower the age for screening in Northern Ireland -- where routine breast screening programs are reserved for women between the ages of 50 and 64. Rutherford says this is inadequate as there is an "absolutely chronic" number of younger women suffering from breast cancer.

Although there is a reduced-age screening program that monitors women beginning at age 40, Rutherford would like to see the screening age reduced to 30. Until then, she is educating women about how they can be vigilant about their own care. She urges women to report to doctors anything that just doesn't feel right. And because doctors may excuse symptoms because women are "too young" for breast cancer -- that's what doctors told her -- women must aggressively pursue medical care. Rutherford kept pursuing the thickening she felt in her breast -- and eventually she was referred for screening.

Rutherford has had a partial mastectomy, chemotherapy, and radiation treatment. And she is now active in the Ulster Cancer Foundation's new support group -- specifically for women under the age of 40.