He bragged that he had survived a nasty fall some months earlier, and that his doctor had given him a clean bill of health.
His headache cured, the man went home and two months later, he was given a clean bill of health.
Scientific research is giving Gulf seafood a clean bill of health.
To “get a clean bill of health” is to be told by some authoritative source, generally a doctor, that one is perfectly healthy. The phrase is sometimes used figuratively to indicate that a person or organization has been found free of any sort of irregularity: “After looking into her financial background, the Senate gave the nominee a clean bill of health.”