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J.C. Amberlyn / AP

A fund associated with the activist hedge fund Jana Partners has bought an undisclosed stake in Zimmer Biomet, according to a federal merger filing. That occurred just one day after Zimmer, a medical device conglomerate, nudged out CEO David Dvorak due to another dismal quarter by Wall Street's standards.

Why it matters: Jana is known to shake things up, and Zimmer has already started down that path. Amazon acquired Whole Foods after Jana bought its stake, and the hedge fund was around when Time changed top leadership. Jana is also somewhat familiar with medical devices, owning part of NuVasive. Jana and Zimmer did not immediately respond to questions.

Go deeper

Updated 9 hours ago - Politics & Policy

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Illustration: Eniola Odetunde/Axios

  1. Health: Most vulnerable Americans aren't getting enough vaccine information — Fauci says Trump administration's lack of facts on COVID "very likely" cost lives.
  2. Politics: Biden unveils "wartime" COVID strategyBiden's COVID-19 bubble.
  3. Vaccine: Florida requiring proof of residency to get vaccine — CDC extends interval between vaccine doses for exceptional cases.
  4. World: Hong Kong to put tens of thousands on lockdown as cases surge.
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Trump impeachment trial to start week of Feb. 8, Schumer says

Senate Majority Leader Chuck Schumer. Photo: The Washington Post via Getty

The Senate will begin former President Trump's impeachment trial the week of Feb. 8, Majority Leader Chuck Schumer announced Friday on the Senate floor.

The state of play: Schumer announced the schedule after reaching an agreement with Republicans. The House will transmit the article of impeachment against the former president late Monday.

11 hours ago - Health

CDC extends interval between COVID vaccine doses for exceptional cases

Photo: Joseph Prezioso/AFP via Getty

Patients can space out the two doses of the coronavirus vaccine by up to six weeks if it’s "not feasible" to follow the shorter recommended window, according to updated guidance from the Centers for Disease and Control and Prevention.

Driving the news: With the prospect of vaccine shortages and a low likelihood that supply will expand before April, the latest changes could provide a path to vaccinate more Americans — a top priority for President Biden.