A "bill of health" usually refers to a document attesting to the medical condition of an individual, especially a sailor or a traveler. There are several synonyms for this term such as a health certificate, medical clearance, health report, or certificate of health. These documents are often required to prove that one is not carrying any communicable diseases and is fit to travel. A bill of health may also be required for some types of visas or when applying for a job that involves working with children or vulnerable populations. Other similar terms include a clean bill of health, doctor's statement, health declaration, or medical examination report.