COVID-19 updates: Michigan, Minnesota, New Mexico leading nation in cases

Dr. Anthony Fauci said vaccinated family members "can feel good about enjoying a typical Thanksgiving, Christmas," in an interview Monday hosted by the Bipartisan Policy Center.

But Fauci warned that cases are still high, so people should wear masks when they're in groups of people in indoor settings.

"We are not going to be going through this indefinitely," Fauci said. "How quickly we get to the end depends on us: how well we vaccinate, how well we get boosted and how well we do the kinds of things to protect ourselves."

-ABC News' Cheyenne Haslett

The daily case average in the U.S. now stands at 78,500 – a 23% jump over the last 2.5 weeks, according to federal data

Twenty-one states have seen an uptick in daily cases of 10% or more over the last two weeks: Arizona, Arkansas, Connecticut, Illinois, Indiana, Iowa, Kansas, Massachusetts, Michigan, Minnesota, Missouri, Nebraska, Nevada, New Hampshire, New Mexico, New York, Ohio, Pennsylvania, Rhode Island, Vermont and Wisconsin.

Last week marked the first national increase in hospitalizations in nearly 10 weeks. There are now more than 47,000 patients with COVID-19 in hospitals -- up by about 2,000 patients since last Monday, according to federal data.

-ABC News' Arielle Mitropoulos

New York City Health Commissioner Dave Chokshi said he's issuing an advisory allowing all adults to receive a booster, as long as it's been six months since their last Moderna or Pfizer dose or two months since the Johnson & Johnson shot.

Chokshi asked New York City health care providers to "proactively reach out to their eligible patients -- particularly those 65 and older, those with medical conditions, and those who have received a Johnson & Johnson dose."

New York City is seeing an uptick in cases in recent days, Chokshi tweeted, adding that "booster doses can provide one more layer of reassurance, allowing us to breathe a bit easier, either for ourselves or our loved ones, particularly as we gather and travel around the holidays."

Young children can now get vaccinated against COVID-19 in Austria's capital as part of a new pilot project.

Starting Monday, about 200 children ages 5 to 11 can receive the low-dose Pfizer-BioNTech vaccine per day in Vienna. Registration for the pilot project, which is limited to the capital, opened over the weekend and more than 9,000 appointments have since been booked, according to Austrian newspaper Kurier.

The Pfizer-BioNTech vaccine can only be used "off-label" in this instance, because the European Medicines Agency has not yet authorized the shot for use in this younger age group.

Meanwhile, a nationwide lockdown for all unvaccinated individuals over the age of 12 began Monday at midnight. Residents who are not inoculated against COVID-19 are barred from leaving their homes except for basic activities such as work, grocery shopping, going for a walk or getting vaccinated.