INFECTIOUS DISEASE

Moderna, Pfizer, J&J talk omicron response

As COVID-19's new omicron variant has begun to emerge overseas, vaccine makers Moderna, Pfizer and Johnson & Johnson have outlined their respective strategies to tackle the new strain.

Proof of vax required as strict mandate takes effect in LA

Los Angeles is among a growing number of cities across the U.S requiring people to show proof of vaccination to enter various types of businesses and venues. But rules in the nation's second-most-populous city, called SafePassLA, apply to more types of businesses and other indoor locations.

EXPLAINER: How US rules on international travel are changing

More than a year and a half after COVID-19 concerns prompted the U.S. to close its borders to international travelers from countries including Brazil, China, India, South Africa, the United Kingdom and much of Europe, restrictions are shifting to focus on vaccine status.