One year ago this week, CNN called the spread of the coronavirus a pandemic. Two days later, the World Health Organization followed. At this official one-year mark of the pandemic, Dr. Sanjay Gupta checks in with Maria Van Kerkhove, a leader in the World Health Organization’s Covid-19 response. They talk about what they’ve learned and what still lies ahead. To learn more about how CNN protects listener privacy, visit cnn.com/privacy