King Charles III was diagnosed in early February, just 17 months into his reign. The 75-year-old monarch’s daughter-in-law, Kate Middleton, underwent a “planned” abdominal procedure in January, then was not seen in public for several months.

King Charles III used his annual Christmas message Wednesday to hail the selflessness of those who have cared for him and the Princess of Wales this year, after both were diagnosed with cancer. The 76-year-old monarch said he and his family are “continually” impressed by those who dedicate their lives to helping others.

King Charles III used his annual Christmas address to thank the medical workers who have provided care for the royal family and hailed the humanitarian workers “tirelessly” providing aid to those engulfed in conflict around the world.