By David Leonhardt

Good morning. The U.S. is behind on Omicron. Biden offers his plan today.

Omicron mobilization

President Biden's Covid-19 response got off to a strong start. In his first few months in office, he and his team eliminated the chaotic, scientifically dubious messages that had come from the Trump administration and rapidly accelerated the pace of vaccinations.

In doing so, Biden compared the fight against Covid to wartime mobilization. "It will be the first priority, the second priority and the third priority — to deal with Covid and bring down the spread and bring down the death rate," he told me during a phone call shortly before taking office.

But the Biden administration has fallen behind in recent months — on persuading people to get booster shots, on approving lifesaving treatments and on making Covid tests easily available. With the Omicron variant spreading rapidly, Biden faces another need to mobilize the federal government. He is set to give a speech today outlining his plans to do so.

According to White House officials, the plans include: sending military troops to help hospitals cope with Covid surges; deploying ventilators to places that need them; invoking a wartime law to accelerate production of Covid tests; sending free tests to people next month; and opening more vaccination clinics.

Omicron already accounts for about 75 percent of new cases in the U.S., the C.D.C. said yesterday, and experts expect cases to soar over the next month. The vast majority will be mild because the vast majority of Americans have some degree of immune protection (and because childhood Covid is almost always mild). But Omicron may cause such a large increase in cases that it will nonetheless overwhelm hospitals, many of which are already near capacity.

One potential problem is hospital staffing. One-third of all health care workers may contract Covid and need to miss work, Michael Osterholm of the University of Minnesota said on the podcast "In the Bubble."

"The good news is it could be over quickly," Andy Slavitt, a former White House adviser and the host of "In the Bubble," told me, referring to the Omicron surge. "The bad news is that almost everything could face some kind of shortage."

Here are the three major areas in which the U.S. has fallen behind:

1. Boosters

For months, Americans heard a message — from experts, politicians and journalists — that anybody who had received two Covid shots was "fully vaccinated." That message is no longer fully accurate. If you received your second shot more than six months ago (or a Johnson & Johnson more than two months ago), your immunity has begun to wane. You are more likely to contract Omicron than somebody who has received a booster shot.

People who closely follow Covid news are aware of the power of boosters. But millions of other Americans are not. About 73 percent of Americans have received at least one vaccine shot, and less than 20 percent have received a full initial dose plus a booster, according to the C.D.C.

In a notable development, Donald Trump yesterday said that he had received a booster shot and encouraged his supporters to embrace Covid vaccines. In the past, Trump has been less positive about vaccines, and many conservatives continue to sow vaccine misinformation.

In heavily Democratic areas, the problem is different: a shortage of shots before holiday gatherings. "My local CVS pharmacist said they have been besieged and are no longer taking walk-ins," Carey Bodenheimer, a California resident, tweeted yesterday.

One idea, if you're not boosted yet: Search online for a nearby clinic that does not require appointments. That worked for my family.

2. Treatments

Public health officials have demanded a lot of flexibility from Americans during this pandemic, as Matthew Yglesias of Substack has pointed out: Keep your children home from school. Work at home. Cancel family events. Save the masks for medical workers — then again, start wearing masks now!

But public health agencies like the F.D.A. and C.D.C. have frequently failed to show much flexibility themselves. Rather than overhauling their approach during a global emergency, they have been slow to take steps that could have saved lives — like encouraging mask use sooner, giving full approval to vaccines sooner or encouraging mix-and-match booster shots sooner.

"What's been sticking in my craw," Yglesias wrote, "is the extent to which America's public health institutions themselves have shown so little flexibility during this crisis even as they see the virtue of flexibility in everyone else's behavior."

The latest example is the F.D.A.'s lack of approval for a Pfizer treatment intended for people who have contracted Covid and are at risk of serious illness. The treatment, known as Paxlovid, reduces hospitalization and death by about 90 percent, Pfizer says.

Obviously, if the F.D.A. has an undisclosed reason to believe that the treatment is problematic, the slowness would be justified. But recent history suggests the agency often moves slowly and passively out of bureaucratic habit, not substantive concern.

3. Testing

The simultaneous arrival of Omicron and the holiday season has caused a surge in demand for rapid Covid tests. They are again nearly impossible to find in some places. As my colleague Tara Parker-Pope asks, "How do we get through the holidays and the next two months without rapid tests?"

Biden's announcements today — to increase production and distribute free tests next month — are intended to address the shortage.

The bottom line: On any individual level, many Americans remain at very small risk of a severe case of Covid. But the unvaccinated face serious risks. Some vaccinated Americans — including the elderly and people receiving cancer treatments — face a meaningful amount of risk. And the country's medical system is at risk of being swamped.

Any kind of progress by the Biden administration, governors and other officials over the next few weeks is likely to help save lives.

More on the virus:

• The N.H.L. paused its season because of the surge. And Omicron continues to disrupt Broadway shows.
• Duke joined a growing list of universities requiring boosters.
• In Europe, some nations are imposing tough restrictions, others, including France, are lying back for now.

THE LATEST NEWS

• White House officials sought to downplay their rift with Senator Joe Manchin of West Virginia. (Here's more about Manchin's history of fighting climate change measures.)
• The House committee investigating Jan. 6 is seeking documents from a sitting member of Congress: Scott Perry, a Pennsylvania Republican.
• The E.P.A. will require new cars to get 55 miles per gallon starting in 2026.
• Trump sued New York's attorney general to stop an investigation into his business practices.
• The White House has a new resident: Commander, a 3-month-old German shepherd with large, pointy ears.

• The U.S. and Britain have sent experts to help Ukraine prepare for a possible Russian cyberattack.
• A group of kidnapped missionaries in Haiti said they escaped their captors in a daring late-night breakout.
• Universal Television and CBS have dropped Chris Noth from "The Equalizer" over allegations that he sexually assaulted two women.

Times Opinion looked at the 41 most important and most absurd debates of the year. (Read more about the project in the Times Opinion newsletter.)

There's no need to close schools again, Harvard's Joseph G. Allen writes.

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ARTS AND IDEAS

Frodo forever

Elijah Wood, known forever as the hobbit Frodo from "The Lord of the Rings," possesses a specific kind of fame. It comes from starring in a franchise that created cultural moments, won several Oscars and was backed by a deeply invested fandom.

The first installment of the director Peter Jackson's "Rings" trilogy — adapted from the J.R.R. Tolkien fantasy novels — was released 20 years ago this week. Wood, now 40, spoke with The Times about the filmmaking experience.

Life on set: His favorite moments were the mundane ones, "like getting our hobbit feet taken off because we had to vacate set as it started to snow" and weekend surf trips "with the other hobbits and Orlando" Bloom, who played the elf Legolas.

On the current film landscape: "Peter and the larger team were allowed to make the movies the way that they wanted to make them without much outside perspective," he said, referring to the trilogy's 16 consecutive months of filming in New Zealand, adding, "I don't know if he would be able to make them in the same way now."

Keepsakes: Wood kept a pair of hairy hobbit feet. "I'm sure over time they will degrade, because I don't think latex lasts forever," he said. "But they were in good shape the last time I looked."

PLAY, WATCH, EAT

This creamy vegetarian soup is built on cauliflower, potatoes and white beans.

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Why we clutter, and what to do about it.

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The pangram from yesterday's Spelling Bee was matriarch. Here is today's puzzle — or you can play online.

Here's today's Mini Crossword, and a clue: Child of cooking fame (five letters).

If you're in the mood to play more, find all our games here.

Thanks for spending part of your morning with The Times. See you tomorrow. — David

P.S. The Times's Maggie Haberman asked Trump about his changed message on vaccines. He sent her this response:

Here's today's print front page.

"The Daily" is about Manchin.

Claire Moses, Ian Prasad Philbrick, Tom Wright-Piersanti, Ashley Wu and Sanam Yar contributed to The Morning. You can reach the team at themorning@nytimes.com.

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