One of the business sectors hit hardest by the novel coronavirus pandemic has been air travel. Passenger volume is down a stunning 96 percent in the U.S., while airline losses have topped $300 billion worldwide. Despite canceled flights, travelers are not easily able to get their money back. Meanwhile, pilots and other staff worry for their safety. Economics correspondent Paul Solman reports.

From the moment the novel coronavirus was identified, there were questions about its origin. This week, reports suggest U.S. diplomats are concerned about a lab in Wuhan, China -- the city where the outbreak began. Nick Schifrin reports and talks to Dr. Luciana Borio, who served on the National Security Council under President Trump, about what scientists do and don't know about this deadly virus.

Maria Lobifaro is a nurse at a VA hospital in Brooklyn that has been converted to care only for coronavirus patients. Already, more than 30 deaths related to COVID-19 have occurred there. Lobifaro, a member of the largest union for registered nurses in the country, joins William Brangham to discuss how her job these days involves too little protection, too much risk -- and too many deaths.

One of the most important pieces of safety gear for health care workers amid the COVID-19 pandemic is the N95 mask, designed to filter out 95 percent of airborne particles. But the surge of patients with the highly contagious disease has meant way more demand than supply. Now, scientists are exploring whether it's possible to decontaminate and reuse the essential coverings. John Yang reports.

At the evening White House briefing of the Coronavirus Task Force, President Trump laid out a phased approach to reopening the U.S. economy. He also emphasized that governors would be able to make their own decisions about when to lift pandemic restrictions in their states. Yamiche Alcindor joins Judy Woodruff to discuss the details of Trump's plan and why COVID-19 testing continues to be a worry.

California therapist Kat Zwick tested positive for COVID-19 in mid-March, about a week after returning from a New York City conference. Her symptoms worsened to an "almost unbearable" level of severity as she isolated in her bedroom. Now recovering, Zwick hopes her story will encourage others to take the illness seriously and stay home. This is her Brief But Spectacular take on surviving COVID-19.

The U.S. death toll from novel coronavirus is approaching 30,000. Though President Trump is eager to lift the restrictions prompted by the pandemic and "reopen" the economy, other leaders continue to express concern that doing so would undermine efforts to contain the virus. Trump is also battling with the World Health Organization over their initial response to the outbreak. John Yang reports.

President Trump said Tuesday he will cut U.S. funding for the World Health Organization, accusing the body of being too trusting of China's early assertions that it had the novel coronavirus under control. But critics of the move say that WHO is playing an integral role amid the pandemic -- and that no other organization is poised to take its place. Nick Schifrin joins Judy Woodruff to discuss.

Dr. Mark McClellan and Dr. Scott Gottlieb, both former commissioners of the FDA, have been planning how to reignite a U.S. economy devastated by the coronavirus pandemic. But the gradual reopening they lay out would happen only after several key milestones are reached. McClellan, now director of the Duke-Margolis Center for Health Policy at Duke University, joins Judy Woodruff to discuss.

Florida is among the U.S. states seeing cases of COVID-19 grow significantly. Its surgeon general now says residents will likely need to wear masks in public for up to a year. But for health care workers, protective equipment measures are much more extreme. William Brangham talks to Joseph Falise, a nurse with the University of Miami Health System, about the physical and mental strain involved.