What happened, in summary

Oswald Peterson was diagnosed in January 2017 after sudden severe back pain, labored breathing, weakness, and weight loss. Urgent care first treated him as if he might have pneumonia or COPD, but his regular doctor at NewYork-Presbyterian quickly recognized how sick he was and arranged hospital testing. The diagnosis was an aggressive form of Stage IV lung cancer. Oswald described his left lung as essentially one large cancerous tumor, with cancerous nodules in his chest. The cancer had spread through his body, including lymph nodes and the spine, and both his lungs and heart were filling with fluid, making breathing difficult. Doctors felt his body could not withstand chemotherapy or radiation. Then a doctor offered a newer treatment: immunotherapy. The checkpoint drug name, biomarker result, and maintenance schedule were not shared. Oswald said immunotherapy caused no side effects for him. After the first dose in the hospital, he was able to go home, return to the gym, and eventually complete an hour on the elliptical while breathing deeply again. As of December 2020, he described recovery, travel, Carnival celebrations, and a renewed appreciation for life. His story supports a strong response to immunotherapy, but not an explicit NED claim overall.