Who invented the health certificate?

The health certificate was not invented by anyone, but stipulated by law. Article 34 of People's Republic of China (PRC) Food Safety Law stipulates that food producers and operators shall establish and implement the health management system for employees. Persons suffering from digestive tract infectious diseases such as dysentery, typhoid fever and viral hepatitis A, and persons suffering from diseases that hinder food safety such as active tuberculosis, suppurative or exudative dermatosis, shall not engage in direct contact with imported food.