Omicron updates: COVID outbreak reported on cruise ship docking in New Orleans
At least 10 people on board have tested positive for the virus.
As the COVID-19 pandemic has swept the globe, more than 5.2 million people have died from the disease worldwide, including over 785,000 Americans, according to real-time data compiled by Johns Hopkins University's Center for Systems Science and Engineering.
Just 59.6% of the population in the United States is fully vaccinated against COVID-19, according to data from the Centers for Disease Control and Prevention.
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'Still have more questions than answers' on omicron: WHO DG
World Health Organization Director-General Dr. Tedros Adhanom Ghebreyesus said Tuesday that "we should not be surprised" by the emergence of omicron, because "this is what viruses do."
"The longer we allow the pandemic to drag on -- by failing to address vaccine inequity, or to implement public health and social measures in a tailored and consistent way -- the more opportunity we give this virus to mutate in ways we cannot predict or prevent," Tedros said.
He continued, "We still have more questions than answers about the effect of Omicron on transmission, severity of disease, and the effectiveness of tests, therapeutics and vaccines. The global response must be calm, coordinated and coherent. At the same time, we must not forget that we are already dealing with a highly transmissible, dangerous variant – the Delta variant, which accounts for almost all cases globally."
FDA says it's working quickly as possible to evaluate omicron
The FDA in a new statement said it's working as quickly as possible to evaluate the potential impact of omicron on the currently available diagnostics, therapeutics and vaccines.
"Historically, the work to obtain the genetic information and patient samples for variants and then perform the testing needed to evaluate their impact takes time,' the FDA said. "However, we expect the vast majority of this work to be completed in the coming weeks."
The FDA stressed that vaccines, boosters and masks are the best ways to stay protected.
-ABC News' Eric M. Strauss
Passengers arriving in US from South Africa sent home with testing kits
The CDC said passengers who arrived in the U.S. from Johannesburg, South Africa, on Sunday -- before travel restrictions took effect -- were offered free at-home PCR testing kits.
Passengers were told to wait three to five days before collecting a sample that they could then mail back for testing. It’s not clear how many have done so or if any were positive.
-ABC News' Anne Flaherty
Global case count of omicron variant tops 200
More than 200 confirmed cases of the omicron variant, first identified in Southern Africa, have been reported in over a dozen countries around the world, according to an open-source tracker run by Newsnodes and BNO News.
The tracker shows South Africa has the highest tally by far, with 114 confirmed cases, followed by 19 in Botswana; 14 in The Netherlands; 13 in Portugal; 11 in the United Kingdom; five in Australia; five in Germany; five in Canada; five in Hong Kong; four in Italy; two in Israel; two in Denmark; one in the French island territory of Reunion; one in Austria; one in Sweden; one in Belgium; one in Czech Republic; and one in Spain.
So far, no cases have been confirmed in the United States.