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AP

Physician recommendations vary on when to start and stop mammograms for breast cancer screening — and how often to screen patients in between, according to a new study in the Journal of the American Medical Association Internal Medicine.

Why it matters: Doctor recommendations are one of the most important factors determining whether and when patients get screened for breast cancer. Breast cancer can be detected — and then treated — earlier with mammograms, but there is a risk of false positives and unnecessarily treating the disease. The study "suggests a large proportion of primary care physicians recommend screening mammography for women who are more likely to experience harms than benefits from the examination," per researchers not involved in the study.

Researchers found 81 percent of doctors surveyed recommended women between the ages of 40 and 44 receive mammograms and 88 percent suggested screening to patients aged 45 to 49. That advice counters guidelines from the U.S Preventive Services Task Force that suggests mammography for women should begin at age 50 and should occur every two years.

Go deeper

45 mins ago - Health

CDC panel: COVID vaccines should go to health workers, long-term care residents first

Hospital staff work in the COVID-19 intensive care unit in Houston. Photo: Go Nakamura via Getty

Health-care workers and nursing home residents should be at the front of the line to get coronavirus vaccines in the United States once they’re cleared and available for public use, an independent CDC panel recommended in a 13-1 emergency vote on Tuesday, per CNBC.

Why it matters: Recent developments in COVID-19 vaccines have accelerated the timeline for distribution as vaccines developed by Pfizer and Moderna undergo the federal approval process. States are preparing to begin distributing as soon as two weeks from now.

Obama: Broad slogans like "defund the police" lose people

Snapchat.

Former President Barack Obama told Peter Hamby on the Snapchat original political show "Good Luck America" that "snappy" slogans such as "defund the police" can alienate people, making the statements less effective than intended.

What he's saying: "You lost a big audience the minute you say it, which makes it a lot less likely that you're actually going to get the changes you want done," Obama told Hamby in an interview that will air Wednesday morning at 6 a.m. EST on Snapchat.

Nasdaq's ultimatum

Photo: Kelly Sullivan/Getty Images

New diversity and inclusion rules are on the table for some of America's most powerful corporations, courtesy of one of its most powerful stock exchanges.

What's new: Nasdaq is threatening to delist companies that won't move toward having at least one woman and at least one underrepresented minority or LGBTQ person on their corporate boards.