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In a national address on Monday, U.K. Prime Minister Boris Johnson became the latest world leader to order a nationwide lockdown in an effort to stop the spread of the coronavirus.

Why it matters: Johnson warned on Sunday that a surge of coronavirus cases over the next two weeks could cripple the country's National Health Service, and that the U.K. is only "a matter of weeks" behind Italy — now the site of the worst coronavirus outbreak in the world.

  • "I urge you, at this moment of national emergency, to stay at home, protect our NHS, and save lives," Johnson said.
  • The government will reassess the lockdown in three weeks.

Details: Johnson ordered all non-essential shops, playgrounds, libraries, gyms and places of worship to close, and banned public meetings of more than two people, which he said will be enforced by police. He said citizens can leave their homes for the following "very limited" reasons:

  • Shopping for basic necessities as "infrequently as possible"
  • One form of exercise a day
  • Medical need, to provide care or to help a vulnerable person
  • Traveling to and from essential work

Between the lines: This is a huge reversal from Johnson's original coronavirus strategy, which eschewed lockdowns and closures like those being implemented around Europe in favor of allowing millions to be infected to establish "herd immunity."

Go deeper: U.K. hedges its massive coronavirus gamble

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Oklahoma Gov. Kevin Stitt tests positive for coronavirus

Oklahoma Gov. Kevin Stitt. Photo: Alex Wong/Getty Images)

Oklahoma Gov. Kevin Stitt (R) announced on Wednesday he has tested positive for the coronavirus and will self-isolate, Tulsa World reports.

Why it matters: The 47-year-old Stitt is believed to be the first governor in the U.S. to test positive. He attended President Trump's rally in Tulsa last month, which the county's health department director said likely contributed to a surge in cases in the region.

Updated 3 hours ago - Politics & Policy

Coronavirus dashboard

Illustration: Sarah Grillo/Axios

  1. Global: Total confirmed cases as of 11 a.m. ET: 13,357,992 — Total deaths: 579,546 — Total recoveries — 7,441,446Map.
  2. U.S.: Total confirmed cases as of 11 a.m. ET: 3,432,307 — Total deaths: 136,493 — Total recoveries: 1,049,098 — Total tested: 41,764,557Map.
  3. Public health: Florida's outbreak is getting worse — Testing is again overwhelmed by massive U.S. caseload.
  4. Business: UnitedHealth posts most profitable quarter in its history — Walmart will require all customers to wear masks.
  5. Politics: White House says it didn't clear Navarro op-ed that attacked Fauci.

Walmart will require all customers to wear masks

Photo by Scott Olson/Getty Images

Walmart will require all customers to wear face masks beginning next week in all of its 5,000 company-owned stores, in addition to its Sam's Club locations, the company announced Wednesday.

Why it matters: Walmart is the largest retailer in the U.S. and the latest in a string of national chains — including Costco and Starbucks — to mandate masks for customers.