President Biden announced Tuesday that his administration is working to purchase an additional 200 million doses of the two COVID-19 vaccines that have been authorized for emergency use, with the goal, the White House says, of having enough vaccine supply for the entire adult U.S. population by the end of the summer.

"This increases the total vaccine order for the U.S. by 50%, from 400 million to 600 million with these additional doses expected to deliver this summer," the White House said in a fact sheet. The Trump administration had secured contracts with the two companies for the already-pledged 400 million doses.

An NPR analysis last week found that the two drugmakers needed to increase their pace of production to meet their original promises of 100 million doses apiece delivered to the United States by the end of March.

At about 7 p.m. ET Monday, the House delivered to the Senate an article of impeachment against former President Donald Trump, a move that will trigger preparations for a historic trial.

The trial itself will begin on Feb. 9, giving the nine House impeachment managers and Trump's defense team two weeks to file briefs and finalize their legal preparations.

"There are three essential items on our plate: the trial of President Trump now that the House has impeached him; bold, strong COVID relief; and approving the president's Cabinet," Senate Majority Leader Chuck Schumer told reporters on Sunday.

Since the nation began distributing vaccines more than a month ago, it has moved far more slowly than officials hoped and has been stymied by widespread logistical problems. But West Virginia has stood out for its success in getting people vaccinated. About 9 percent of all West Virginians have received a first dose of the coronavirus vaccine, a larger segment than in every state but Alaska and double the rate of some. No state has given a larger share of its residents second doses, a crucial step to securing the best chance at immunity.

While many states are struggling to hand out the shots that the federal government has provided to them, West Virginia has given out 83 percent of its doses, by far among the highest

At the current pace, officials said, it could take up to five months to finish vaccinating people 65 and older, let alone younger people in the general population.

Joe Biden is only the second Catholic president of the United States. He's also a supporter of abortion rights — a position at odds with official teachings of the Roman Catholic Church.

Jamie Manson, president of Catholics for Choice, said she hopes for what she describes as a "better dialogue" between church leaders and some rank-and-file Catholics who disagree with aspects of the church's teachings.

Polling suggests a majority of American Catholics support abortion rights in most or all cases and oppose overturning Roe v. Wade, the 1973 U.S. Supreme Court decision that legalized abortion nationwide.

Protests exploded across Russia over the weekend, fueled largely by videos posted to social media, despite attempts by the Russian government to censor content across various platforms. The protesters braved extreme cold, police brutality and mass arrests, calling for the release of opposition leader Alexei Navalny, who was detained last week shortly after returning to the country.

But the Russian media regulator Roskomnadzor quickly jumped to pressure social media platforms to remove videos that it said called for minors to participate in protests, warning that it was illegal for them to do so. On Friday, the government claimed that 38% of all offending videos on TikTok, 50% on YouTube and 17% on Instagram had been removed

By Sunday, over 3,500 demonstrators across the country had been detained, according to OVD-Info, an activist group that monitors arrests and protests. The group said it had never tracked so many arrests.

Just hours after being sworn into office on Inauguration Day, President Biden has signed three of 17 planned executive actions to try to hit the ground running on his top priorities — and to roll back some of former President Donald Trump's initiatives in those areas.

Biden wants to build momentum on his plans to address the COVID-19 crisis, the economy, racial justice and climate change. Among many measures, he plans to revoke Trump's travel ban affecting Muslim-majority nations and extend the moratoriums on evictions and foreclosures as a result of the coronavirus pandemic.

"The president-elect has promised to root out systemic racism from our institutions," said Susan Rice, Biden's domestic policy adviser, ahead of Biden's inauguration. "This initiative is a first step in that historic work. Delivering on racial justice will require that the administration takes a comprehensive approach to embed equity in every aspect of our policymaking."

The US has officially determined that China is committing genocide and crimes against humanity against Uyghur Muslims and ethnic and religious minority groups who live in the northwestern region of Xinjiang.

"This genocide is ongoing, and...we are witnessing the systematic attempt to destroy Uyghurs by the Chinese party-state," US Secretary of State Mike Pompeo said in a statement Tuesday, on the last full day of the Trump administration.

The US State Department has previously estimated that up to two million Uyghurs, as well as members of other Muslim minority groups, have been detained in a sprawling network of internment camps in the region.

One, first identified in southeast England, has now shown up in at least 50 countries and appears to be spreading more efficiently than older variations of the virus. Its appearance has frightened political leaders, who have closed borders and imposed travel restrictions in attempts to curb its spread.

So far, none has done what scientists most fear and mutated to the point that it causes more severe disease, or evades the protection provided by vaccination. While some of the new variants appear to have changes that look like they could affect immune response, it's only by a matter of degree.

At the top of the list for researchers in the US is the B.1.1.7 variant first seen in Britain. The US Centers for Disease Control and Prevention warned last week it could worsen the spread of the pandemic.

While millions wait for a life-saving shot, the U.S. death toll from the novel coronavirus continues to soar upwards with horrifying speed. Today, the last full day of Donald Trump's presidency, the official death count reached 400,000 — a once-unthinkable number. More than 100,000 Americans have perished in the pandemic in just the past five weeks.

In the U.S., someone now dies from COVID-19 every 26 seconds. And the disease is now claiming more American lives each week than any other condition, ahead of heart disease and cancer, according to the Institute for Health Metrics and Evaluation at the University of Washington.

Certain parts of the country have a disproportionately high death rate. Alabama and Arizona, in particular, have experienced some of the highest death rates, given their populations. The virus continues to kill Black and Indigenous Americans at much higher rates than white Americans.

For the first time since the Jan. 6 mob attack on the U.S. Capitol, Senate Majority Leader Mitch McConnell publicly denounced President Trump and his supporters for instigating the insurrection.

"They were provoked by the president and other powerful people, and they tried to use fear and violence to stop a specific proceeding of the first branch of the federal government, which they did not like."

"Dozens of lawsuits received hearings and courtrooms all across our country. But over and over, the courts rejected these claims, including all star judges that the president himself had nominated," he said at the time.

As the COVID-19 vaccine rolls out, three big questions loom. First, can someone who has been vaccinated still spread the disease? Second, will the vaccine remain effective as the virus itself evolves? And third, how long will the vaccine's protection last?

If the immune response kicks in quickly, very little virus would be produced. Your ability to spread disease "is really a function of how much virus you're producing," Nussenzweig says.

But they don't simply remember one specific antibody that has worked against a virus in the past. They can also randomly generate new antibodies that are similar, and which may be more effective against a strain of virus that your body has never seen.

Lindsey is one of almost 3 million children in the U.S. who have been diagnosed with a serious emotional or behavioral health condition. When the pandemic forced schools and doctors' offices closed last spring, it also cut children off from the trained teachers and therapists who understand their needs.

As a result, many, like Lindsey, spiraled into emergency rooms and even police custody. Federal data show a nationwide surge of kids in mental health crisis during the pandemic — a surge that's further taxing an already overstretched safety net.

Roughly 6% of U.S. children, ages 6 through 17, are living with serious emotional or behavioral difficulties, including children with autism, severe anxiety, depression and trauma-related mental health conditions.

The House of Representatives voted Wednesday to impeach President Trump for "high crimes and misdemeanors" — specifically, for inciting an insurrection against the federal government at the U.S. Capitol.

Just one week before he will leave office, Trump has now become the first U.S. president to be impeached twice.

Impeachment, Pelosi said, is "a constitutional remedy that will ensure that the republic will be safe from this man, who is so resolutely determined to tear down the things that we hold dear, and that hold us together."

Vice President Pence says he won't invoke the 25th Amendment against President Trump, days after violent pro-Trump extremists breached the U.S. Capitol.

"I do not believe that such a course of action is in the best interest of our Nation or consistent with our Constitution," Pence writes. He says the amendment is "not a means of punishment or usurpation," and that invoking it would "set a terrible precedent."

Still, the resolution is likely to pass the Democratic-controlled House. Trump "widely advertised and broadly encouraged" the protests that led to last week's violence, the resolution argues, and then ignored calls to condemn his supporters' actions swiftly. It also cites his repeated efforts to delegitimize the presidential election results with false claims of widespread voter fraud.

The Centers for Disease Control and Prevention announced Tuesday that all air passengers entering the United States will need to provide a negative COVID-19 test before boarding their flight. The new rule will go into effect Jan. 26.

"With the US already in surge status, the testing requirement for air passengers will help slow the spread of the virus as we work to vaccinate the American public," the CDC said.

Airlines won't let passengers board if they fail to comply.

It's been a month since the first COVID-19 vaccine was authorized for emergency use in the U.S. At the time, Dr. Jeff Bahr, who oversees medical group operations for Advocate Aurora Health system in Wisconsin, told NPR that he was optimistic about vaccine rollout.

On a national level, vaccinations fell short of initial expectations in the first weeks: Of about 25 million doses distributed, slightly more than one-third have been administered.

On Monday, House Democrats filed an impeachment resolution charging Trump with inciting an insurrection. A vote is expected this week, likely on Wednesday. Meanwhile, the House is also moving forward with a resolution calling on Vice President Pence to invoke the Constitution's 25th Amendment, relieving Trump of his duties until his term ends next week.

House Democrats' article of impeachment cites both Trump's incitement of his supporters on Wednesday and his call to Georgia Republican Secretary of State Brad Raffensperger in which Trump encouraged the official to "find" enough votes to overturn the election in the state.

Given the timeline and required action from the Senate, removing Trump from office before Jan. 20 is unlikely — if not impossible. However, Schumer is looking into using emergency authority that would let him and Republican leader Mitch McConnell call the Senate back early for a trial, a senior Democratic aide says.

Authorities in China are imposing new coronavirus restrictions near Beijing after a spate of recent outbreaks.

The Associated Press reports that the cities of Shijiazhuang and Xingtai, in the Hebei province, have issued seven-day stay-at-home orders after a week in which more than 300 people tested positive for the coronavirus.

These newest restrictions are drawing comparisons to the lockdown in Wuhan, which began last January, ahead of the Lunar New Year holiday. The city in Hubei province, which was the pandemic's first epicenter, closed its border and restricted movement for 76 days before new cases started to dwindle.

a mob of largely white extremists stage an insurrection in Washington, D.C., set up a noose on a wooden beam outside the U.S. Capitol and walk a symbol of violence and slavery — the Confederate flag — through the building as they stormed and raided it.

There were white extremists who felt at ease giving their names to media outlets and taking selfies with a white police officer.

"Now the world gets to see the difference between these two situations, where one is us protesting to be seen, to be heard, to not be killed, right?" she said. "And then you have these other people who are just mad because they lost."

Privacy concerns have been raised after ministers in Singapore's government acknowledged that data collected by its widely used COVID-19 contact-tracing program may be turned over to police for criminal investigations.

Balakrishnan noted that the Criminal Procedure Code already applies to other types of sensitive information protected by privacy laws, including banking records. He said police have accessed such records in the past "with proper safeguards, and with the good outcomes that Singaporeans have come to expect from our police investigations."

The TraceTogether program was developed by the Singapore government's technology agency and includes a smartphone app or a token that documents proximity to other users. The program was adopted more widely after it became required to enter places such as grocery stores or workplaces, the BBC reported.