clean bill of health INFORMAL
1. when a doctor says that someone is healthy:
He's been given a clean bill of health by the doctor.

2. when someone in authority says that a particular thing is in good condition:
Of 30 countries inspected for airline safety, only 17 received a clean bill of health.

[TahlilGaran] Advanced Learner's Dictionary ▲

clean bill of health
1.
news that an organization is operating correctly.
The airline received a clean bill of health from federal investigators.

2.
news that you are healthy or well.
Johnson was given a clean bill of health by his doctors earlier this month.

Etymology: based on the literal meaning of a clean bill of health (= a statement from a health official that all the people working on a ship are in good health)

[TahlilGaran] English Idioms Dictionary ▲

clean bill of health
a report or certificate that a person or animal is healthy; the assurance that an animal or person is healthy
The doctor gave me a clean bill of health when I visited him last month.

The astronaut was given a clean bill of health before he began training.

[TahlilGaran] English Idioms Dictionary ▲

clean bill of health
n. phr.
1. A certificate that a person or animal has no infectious disease.
The government doctor gave Jones a clean bill of health when he entered the country.
2. informal A report that a person is free of guilt or fault.
The stranger was suspected in the bank robbery, but the police gave him a clean bill of health.

[TahlilGaran] English Idioms Dictionary ▲