In news about the pandemic, nearly a quarter of U.S. hospitals are reporting critical staffing shortages as the Omicron coronavirus variant drives an unprecedented surge in cases.

In Chicago, public schools are closed for a fourth day as talks between the teachers’ union and Mayor Lori Lightfoot over in-person teaching remain at an impasse.

Congressmember Alexandria Ocasio-Cortez is the latest lawmaker to test positive for COVID-19. The New York Democrat, who is vaccinated and boosted, said she is symptomatic and recovering at home.