Study reveals why some lungs are protected against COVID

COVID-19 vaccines have saved at least a million lives in the United States alone, but for many people, a lingering fear remains: if-;or when-;they get hit by the coronavirus, just how bad will it be? Will they breeze through with little more than a sore throat-;or will it saddle them with long-term complications, perhaps even push them to the brink of death?