Omicron updates: COVID outbreak reported on cruise ship docking in New Orleans

The Centers for Disease Control and Prevention said Tuesday it is working to change its international travel guidelines to require COVID-19 testing one day before departure to the U.S. in light of the omicron variant. 

"CDC is working to modify the current Global Testing Order for travel as we learn more about the Omicron variant; a revised order would shorten the timeline for required testing for all international air travelers to one day before departure to the United States," the CDC said in a statement. "This strengthens already robust protocols in place for international travel, including requirements for foreign travelers to be fully vaccinated." 

The CDC continues to recommend that all travelers get a COVID-19 viral test three to five days after arrival in the U.S. and that unvaccinated travelers quarantine for seven days even if they test negative. 

-ABC News' Cheyenne Haslett

Pfizer has officially requested Food and Drug Administration authorization of its COVID-19 booster for 16- and 17-year-olds, the company's CEO said Tuesday evening.

"It is our hope to provide strong protection for as many people as possible, particularly in light of the new variant," Albert Bourla tweeted, referring to omicron, a recently discovered variant of concern, according to the World Health Organization.

-ABC News' Sony Salzman

Nearly 132,000 children tested positive for COVID-19 last week, as pediatric cases remain "extremely high." according to a new report from the American Academy of Pediatrics and the Children’s Hospital Association.

This marks the 16th consecutive week that weekly pediatric COVID-19 cases have been above 100,000. Prior to the recent increases, infections among children had been steadily dropping since the pandemic peak of 252,000 child cases, recorded over the span of a week in early September.

At this time, severe illness due to COVID-19 remains "uncommon" among children, the two organizations wrote in the report. However, they warn that there is an urgent need to collect more data on the long-term consequences of the pandemic on children.

The latest report comes amid growing concerns surrounding the new omicron variant, launching a renewed push to get all eligible Americans vaccinated against COVID-19. To date, about 36% of children ages 5 to 17 have received at least one dose, according to federal data.

-ABC News' Arielle Mitropoulos

Advisers from the U.S. Food and Drug Administration have narrowly approved an endorsement of the Merck COVID-19 pill, voting 13 to 10 in favor of the authorization.

If authorized, it would be the first easy-to-take antiviral pill for COVID-19. Pfizer is also working on a COVID-19 pill, which it hopes will be authorized early next year. The FDA typically takes the advice of its advisers but will make its own final decision. 

During Tuesday’s meeting, advisers spoke positively on Merck's pill, even though it was not found to be quite as effective in the final analysis as it was in an early, preliminary analysis.

However, the advisers expressed doubt about whether it would be safe for pregnant people to use Merck's pill because of the potential risk of harm to the fetus as well as its use in children due to lack of data and similar concerns as in pregnancy. 

-ABC News' Sony Salzman