Nearly 100 patients in serious condition; some schools in high infection areas set to return to distance learning

Omicron-linked staff shortages hit airlines with nearly 1,000 international and domestic flights scrapped Saturday; 6,000 flights affected globally over holiday weekend

New South Wales also reports sharp jump in hospitalizations, as officials say most cases are of the Omicron strain, urge vaccine boosters

PM Naftali Bennett speaks to Pfizer CEO to finalize purchase of 100,000 pills shown to reduce risk of hospitalization, death in high-risk groups by 90%

Transmission rate hits near six-month high of 1.4, as worries over new variant mount; 90 patients listed in serious condition

COVID-19 again disrupts holiday, with flights grounded and church services canceled, but gatherings are easier than last year and billions still manage to celebrate

Eran Segal, who advises government, says country could see 15,000-20,000 cases a day at height of coming wave

US leader urges Americans to prepare for major virus wave: 'The only real protection is to get your shot'

Lufthansa, Delta, United Airlines and many others forced to halt and delay flights as many pilots, flights attendants head into quarantine amid new wave of COVID-19 infections

Data shows 3rd shot 70% effective in preventing illness after 2 weeks but only 45% after 10 weeks; Moderna seems to offer more durable protection, staying at 70% after 10 weeks