There are generally two kinds of health certificates: those who engage in food production, operation and service in public places need to apply for the Health Certificate for Employees; Citizens who travel internationally need to apply for an "International Travel Health Certificate".
Engaged in food production and marketing and public services, according to the provisions of Article 26 of Chapter VI of the current Food Hygiene Law, anyone suffering from digestive tract infectious diseases such as dysentery, typhoid fever and viral hepatitis (including pathogen carriers), active tuberculosis, purulent or exudative skin diseases and other diseases that hinder food hygiene shall not take part in the work of contacting directly imported food.
The above occupational contraindications are collectively referred to as "five diseases".
If you have an international travel health certificate for AIDS /HIV(+), sexually transmitted diseases, open tuberculosis, mental illness and leprosy, you cannot issue it.