Pfizer shows promising COVID vaccine trial results, as Joe Biden names his coronavirus task force

The United States passed 10 million COVID-19 cases today. It’s a grim milestone, especially as the virus is spreading faster than ever. But there’s some encouraging news in the race for a vaccine. One candidate from Pfizer and a German company may be more than 90% effective. 

National Geographic special issue: A World Gone Viral: How the pandemic is changing our lives