South Dakota has had one of the worst spikes of Covid-19 cases in the country, with the positivity rate now climbing above 50%. And still, the state has never instituted a mask mandate or full lockdown. CNN’s Chief Medical Correspondent Dr. Sanjay Gupta talks to Dr. Tom Dean, a family physician in a rural part of the state, about how his community is grappling with this latest outbreak.To learn more about how CNN protects listener privacy, visit cnn.com/privacy