Omicron is spreading more than twice as quickly as the Delta variant in South Africa, scientists report.

ImagePeople waiting to receive a dose of the Pfizer coronavirus vaccine at a clinic in Hillbrow, South Africa, a suburb of Johannesburg.Credit…Joao Silva/The New York Times Underscoring growing concerns about Omicron, scientists in South Africa said on Friday that the newest coronavirus variant appears to spread more than twice as quickly as Delta, which had…

Cognitive Rehab: One Patient’s Painstaking Path Through Long Covid Therapy

Over time, Ms. Purvis, the speech-language pathologist, incrementally ramped up the exercises: arrange numbers in descending order, repeat a sentence in reverse. She increased noise and distraction to approximate Ms. Lewis’s busy work environment. She kept the door open, turned on television news and eventually held sessions in the bustling physical therapy gym. Amid the…