National Institute of Allergy and Infectious Diseases

Scientists are racing to develop a vaccine that proves "safe and effective." It may not prevent infection in everyone who gets it, but it still could eventually stop the pandemic. Here's how.

The group of experts, assembled under the agency run by Dr. Anthony Fauci, warns that using a combination of hydroxychloroquine and azithromycin could result in potential toxicities.

According to Dr. Deborah Birx, the best computer models predict that between 100,000 and 200,000 Americans will die from COVID-19 during the coming months, even if the country continues the strict social distancing measures that most states have adopted. Relaxing those restrictions would send the toll much higher.

Every year, viruses like influenza kill hundreds of thousands worldwide — yet countries don't respond with lockdowns or airport screenings. Here's why they're doing so over the coronavirus outbreak.