I have definitely seen an increase in the number of people coming into my office for mole checks and skin exams this week. Some directly mention Laura Bush. "Well, I just thought I should get it looked at, with Laura Bush and all, you never know." She certainly did pass on an opportunity to encourage screening and prevention of skin cancer.
The New York Times does note the service Laura performed on behalf of breast cancer awareness when she too was diagnosed:
Mrs. Bush has advocated the public discussion of cancer. Speaking in St. Louis in October for Breast Cancer Awareness Month, she lamented how decades ago, "because everyone kept breast cancer a secret, women didn't have regular mammograms or perform breast self-exams, because no one told them to."