◼ IN BRIEF
● Global coronavirus cases have topped 263 million, 5.2m people have died, and almost 8.1 billion vaccine doses have been given. On Dec. 1, the WHO reported that its scientists believe existing shots will likely protect people from the omicron variant, which has begun appearing in Europe after first being identified in southern Africa. ▷ 17 ● Jack Dorsey stepped down as CEO of Twitter on Nov. 29. He says the social network is ready to move on from its founders. Chief Technology Officer Parag Agrawal will take over; at 37, he’ll be the youngest leader of any S&P 500 company. ▷ 27 ● Barbados became the world’s newest republic, ending British rule on Nov. 30. At a ceremony attended by Prince Charles, the Caribbean island removed Queen Elizabeth as head of state…