The U.S. Preventive Services Task Force has updated its recommendations for breast cancer screening once again. The recommendations now stipulate that women and people assigned female at birth should begin getting mammograms at age 40, and continue every other year until age 74. The previous guidelines recommended beginning screening at age 50. These guidelines carry a lot of weight because they determine if mammography will be considered preventive care by health insurance and therefore covered at no cost to the patient.

Why have the guidelines changed? And how are these decisions made in the first place? To answer those questions and more Ira Flatow talks with Dr. Janie Lee, director of breast imaging at the Fred Hutchinson Cancer Center and professor of radiology at the University of Washington School of Medicine.

Transcript for this segment will be available the week after the show airs on sciencefriday.com.

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