James Doubek

Much is still unknown about the coronavirus, including a full picture of perhaps its most important impact: who it has killed.

Of the 4,624 people who have already died of the coronavirus in Pennsylvania, at least two-thirds of them were associated with nursing homes or other long-term care facilities.

Last week Pennsylvania's health department said it's "executing a robust universal testing strategy" for the more than 80,000 residents and 10,000 staffers at 1,900-plus facilities.

Sales are booming at many bike shops around the country, as people stuck at home try something new for exercise and essential workers adapt to scaled-down public transit.

It's an especially opportune time for those who might otherwise be nervous about sharing the streets with cars — mayors across the country have closed streets to encourage cyclists and joggers to exercise.

States around the country are gradually reopening their economies, even as most of them fail to meet voluntary guidelines set by the White House for doing it safely.

At least 31 states are partially reopening as of Monday.

Sen. Bill Cassidy, a Republican of Louisiana and also a medical doctor, is thinking a lot about what it will take for schools to reopen.

Cassidy sits on the Senate's Health, Education, Labor and Pensions Committee, which will hear from public health officials this week about how to safely reopen U.S. businesses and schools.

Alabamians are now being encouraged — but no longer ordered — to stay at home, according to new guidelines Gov. Kay Ivey issued last week.

Ivey's new "safer at home" order opens retail stores to 50% occupancy and beaches to groups under 10 people with social distancing. Elective surgeries and dental procedures are allowed under certain conditions. But restaurants are still limited to take-out and movie theaters are still closed.

Members of the Trump administration say there is sufficient coronavirus testing for states to move to the first phase of the White House's reopening plan.

But many state and local officials and health care providers say testing is still far short of where it needs to be to consider lifting some social distancing restrictions.

Updated at 8:37 p.m. ET

At a briefing of his task force Sunday, President Trump said his administration would have a call with governors and the Federal Emergency Management Agency on Monday to discuss how to increase coronavirus testing capacity in states.

Trump's remarks come as the administration defends its testing response and guidelines for states to start resuming normal operations, even as several governors said they are far short of the testing capacity they'd need to lift restrictions.

Updated at 5 a.m. ET Monday

British Prime Minister Boris Johnson, who was diagnosed with the coronavirus last month, has been admitted to the hospital for testing on the advice of his doctor, his office said Sunday.

"This is a precautionary step, as the Prime Minister continues to have persistent symptoms of coronavirus 10 days after testing positive for the virus," a spokesperson said in a statement.

California Gov. Gavin Newsom said Saturday that the state had significantly reduced a testing backlog even as he announced new collaborations to improve coronavirus testing capacity and infrastructure.

"The testing space has been a challenging one for us and I own that," he said. "And I have a responsibility as your governor to do better and to do more testing in the state of California."

New York is the U.S. city hardest-hit by the novel coronavirus pandemic, but public health officials worry that other major metropolises could soon be facing dire numbers of COVID-19 infections as well.

In Chicago, confirmed cases topped 2,600 Tuesday. Mayor Lori Lightfoot predicted a peak in the coming weeks with more than 40,000 hospitalizations.

Dr. Allison Arwady, commissioner of the Chicago Department of Public Health, talked with All Things Considered about the city's preparation and how racial disparities play into the crisis. Here is an excerpt:

A World Health Organization official says the evidence so far shows that the virus that causes COVID-19 is primarily transmitted through "respiratory droplets and contact routes" — from coughs and sneezes — and doesn't seem to linger in the air.

Louisiana will delay its presidential primary election by more than two months over coronavirus fears, becoming the first state to do so.

The state had more than 35 presumptive positive test results for people with coronavirus as of Friday morning.

The primary had been scheduled for April 4 but will now be on June 20.

Dr. Carrie Jurney is on the board of an online organization that works to prevent suicides. It's called Not One More Vet.

This isn't a mental health support group for veterans — it's for veterinarians.

Federal prosecutors on Tuesday said they dismantled one of the largest health care fraud schemes ever investigated by the FBI, charging 24 people in a $1.2 billion alleged scam involving telemedicine and durable medical equipment companies.

Eighteen-year-old Ethan Lindenberger appeared before the Senate Committee on Health, Education, Labor and Pensions on Tuesday to talk about how he decided to get vaccinated against the wishes of his mother, who is anti-vaccine.

The World Health Organization said Friday that security concerns in the Democratic Republic of the Congo's North Kivu region were preventing aid workers from reaching certain areas — and leaving open the possibility of the Ebola virus spreading.

At least 1,500 people could be exposed to the virus, WHO spokesperson Tarik Jasarevic told reporters in Geneva, according to Reuters.

In a move it said was to address the large cost of entering a career in medicine, New York University's School of Medicine said Thursday that it will offer full scholarships to all current and future students in its doctor of medicine program.

NYU said it was the "only top 10-ranked" medical school in the U.S. to offer such a generous package.

Just over four years ago, on July 17, 2014, six delegates on their way to the International AIDS Conference died in the shoot-down of Malaysia Airlines Flight 17 over eastern Ukraine.

The delegates were among the 298 people killed hours after their flight took off from Amsterdam.

International investigations concluded that the missile that downed the jet originated with the Russian military, which has denied involvement.

Health officials are investigating an outbreak of intestinal illness that has sickened dozens and is "likely linked" to salads at McDonald's.

McDonald's said Friday it's voluntarily pulling salads from about 3,000 locations in 14 states, primarily in the Midwest, until it can switch to a different lettuce supplier.

The U.S. State Department has sent "a number of individuals" from the U.S. Consulate in Guangzhou, China, back to the U.S. after screenings showed they may have been affected by mysterious health problems similar to what diplomats experienced in Cuba.

Police in Nebraska say they've seized 118 pounds of pure fentanyl — one of the largest seizures in U.S. history, they say, and enough to kill more than 26 million people, according to government estimates.

Nebraska State Patrol troopers say they seized the drugs during a traffic stop on Interstate 80 near Kearney on April 26, but at the time suspected most of the powder to be cocaine.

With assisted suicide illegal in his home country of Australia, scientist David Goodall of Perth traveled to Basel, Switzerland, to die at the facility of the assisted suicide advocacy group Life Circle.

The 104-year-old man told reporters on Wednesday that he had no doubts about his decision, hours before he died Thursday.

He died "peacefully" at 12:30 p.m. Thursday, Philip Nitschke of the assisted suicide advocacy group Exit International tweeted.

A new HBO documentary tells a story about families with children who have psychiatric disorders that lead to violent behavior.

A Dangerous Son, which premieres Monday, focuses on three families who are dealing with the simultaneous challenges of handling children prone to lashing out while looking for treatment that is not always available.

"I don't know how to control my anger," 10-year-old Ethan says in one clip.

Elizabeth Holmes, the 34-year-old founder and CEO of the health technology company Theranos, had a compelling story of dropping out of college to launch a multibillion-dollar Silicon Valley venture to revolutionize the blood-testing industry.

Post-traumatic stress disorder is often associated with combat, but trauma comes in many forms.

About 7 or 8 percent of people experience PTSD at some point in their lives, according to the Department of Veterans Affairs. The rate is higher for women than for men: about 10 percent compared with 4 percent. Experiencing sexual assault or child sexual abuse, or living through accidents, disaster or witnessing death can all be contributing factors, in addition to time in combat with the military.

This summer, scientists in California are releasing 20 million mosquitoes in an effort to shrink the population of mosquitoes that can carry diseases.

It sounds counterintuitive. But the plan is to release millions of sterile male mosquitoes, which will then mate with wild female mosquitoes. The eggs the females lay won't hatch, researchers say.