New evidence shows omicron likely spreads twice as fast as delta in South Africa
The mystery of where omicron came from — and why it matters
African leaders condemn travel restrictions as omicron variant spreads globally
Scientists race to answer the question: Will vaccines protect us against omicron?
Experts: More than 70% of Americans need additional vaccine shots for full protection from Omicron
Friends of Minnesota man with omicron are testing positive for coronavirus, health official says
South Korea tightens restrictions after omicron is detected and cases surge
The US has its first omicron case—and the patient was fully vaccinated
1st confirmed U.S. case of Omicron variant detected in California
Will the Vaccines Stop Omicron? Scientists Are Racing to Find Out.
International travelers stranded, angry in omicron's wake: 'The first thing I did was cry'
Omicron variant spreads to North America, Australia and more of Europe
As omicron spreads, studies suggest that travel bans alone don't do much good
The omicron variant is cause for concern — but not panic, Biden says
"Good reason to be worried" as Omicron COVID variant spreads fast
EXPLAINER-How worried should we be about the Omicron variant?
Omicron Cases Mild; Variant Spreads Across Europe: Virus Update
More Countries Find Omicron Cases as Israel Closes Borders
New virus variant casts pall, shocks experts in South Africa
Biden admin announces travel ban for South Africa and 7 other countries, citing new variant
Canada introduces ban on travel from southern Africa over Omicron variant
As Potential Omicron Variant Cases Emerge, an International Scramble to Shut It Out
The US has its first omicron case—and the patient was fully vaccinated
U.S. to restrict air travel from 8 countries over new COVID variant concerns
Israel warns of looming emergency after its first case of omicron, new COVID-19 variant
World scrambles to contain omicron as scientists call for greater vaccination efforts
COVID variant spreads to more countries as world on alert
Fauci says U.S. must study data before deciding on travel ban over new COVID-19 variant
Anthony Fauci says U.S. is "rushing now" to get scientific data about new COVID variant
How vaccine makers plan to address the new COVID-19 omicron variant
The omicron variant spreads across Europe as new travel bans take effect
COVID variant spreads to more countries as world on alert
New York Declares State Of Emergency To Hike Hospital Capacity Ahead Of Omicron Variant
What to know about the newly discovered COVID-19 variant, according to a Johns Hopkins researcher
Israel warns of 'emergency' after detecting new virus strain