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The end was in sight in England, where the tabloids coined a lofty name for the long-awaited moment coronavirus restrictions were to be lifted: “Freedom day.” But on Monday, one week before that June 21 milestone, Prime Minister Boris Johnson delivered the sobering news that the rules would stay in place for at least another month, the consequence of rising cases of the delta virus variant.

“Now is the time to ease off the accelerator,” Johnson said. “I am confident we will not need more than four weeks and we will not go beyond July 19. But now is the time to ease off the accelerator.”

British health officials have said the variant, which was first discovered in India, is 40 percent more infectious than the variant that previously swept through the country, which was first found in England. The delta variant is now dominant in nearly every region of Britain. Leaders there hope the delay will allow more residents to get vaccinated.

Britain has fully vaccinated 44.6 percent of its population, according to tracking from The Washington Post, compared with 43.4 percent of Americans who are fully vaccinated.

Here are some significant developments:

  • California will fully reopen its economy and lift most social distancing curbs on Tuesday, after having administered more than 40 million vaccine doses.
  • A Post analysis found that states with higher vaccination rates now have far fewer virus cases, while states with lower vaccination have significantly higher hospitalization rates.
  • Novavax, a Maryland biotechnology company, announced 90 percent efficacy against illness, including against variants, for its two-shot coronavirus vaccine — and it’s easy to store. Novavax says it will soon apply for regulatory clearance.
  • The Dubai Health Authority said over the weekend that 20 percent of those testing positive for the coronavirus had already been vaccinated, in the latest sign of the challenges faced by vaccination programs that relied heavily on the Chinese Sinopharm vaccine.
  • President Biden vowed Sunday that the United States would continue to supply coronavirus vaccines to the world’s poorest countries, hinting that the nation may “be in a position to provide another billion” doses over the next two years.
  • The United States reported a seven-day rolling average of 14,665 new cases on Sunday, a slight increase from the previous week. The number of reported tests has fallen by about 23 percent in the last week.