The phrase "to repair the body" means to fix or restore the physical condition of a person, typically by addressing any injuries or health issues. Full definition
Because stem cells have the unique ability to develop into many different types of cells, they are an important part of the mechanism for repairing body tissue. (sciencedaily.com)
They would get stem cells to help repair their body. (kidsinthehouse.com)
He also notes that the extra cost of winter tires might be a lot cheaper than repairing body damage from an accident, not to mention the ongoing car insurance surcharges afterward. (automobilemag.com)