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Facebook CEO Mark Zuckerberg. Photo: Christophe Morin/IP3/Getty Images

Wall Street Journal testing revealed that at least 11 popular apps, with millions of downloads to date, have been sharing highly personal data with Facebook.

Details: When users share their body weight, blood pressure, menstrual cycle, or pregnancy status with certain apps, that information is sent to Facebook and often matched with the Facebook profile of that user. At least 6 of the top 15 health and fitness apps in Apple’s iOS store — including iFlo Period & Ovulation Tracker and Instant Heart Rate: HR Monitor — sent sensitive user data to Facebook immediately after the information was collected. Per the WSJ, these apps frequently send this data without any disclosure to users.

Go deeper: What Facebook knows about you

Go deeper

In photos: D.C. and U.S. states on alert for pre-inauguration violence

National Guard troops stand behind security fencing with the dome of the U.S. Capitol Building behind them, on Jan. 16. Photo: Kent Nishimura / Los Angeles Times via Getty Images

Security has been stepped up in Washington, D.C., and state capitols across the U.S. as authorities brace for potential violence this weekend.

Driving the news: Following the Jan. 6 insurrection at the U.S. Capitol by some supporters of President Trump, the FBI has said there could be armed protests in D.C. and in all 50 state capitols in the run-up to President-elect Joe Biden's inauguration Wednesday.

14 hours ago - Politics & Policy

The new Washington

Illustration: Sarah Grillo/Axios

The Axios subject-matter experts brief you on the incoming administration's plans and team.

Rep. Lou Correa tests positive for COVID-19

Lou Correa. Photo: Tom Williams/CQ-Roll Call, Inc via Getty Images

Rep. Lou Correa (D-Calif.) announced on Saturday that he has tested positive for the coronavirus.

Why it matters: Correa is the latest Democratic lawmaker to share his positive test results after last week's deadly Capitol riot. Correa did not shelter in the designated safe zone with his congressional colleagues during the siege, per a spokesperson, instead staying outside to help Capitol Police.