3 days. Because the health certificate is mainly aimed at the staff in the pharmaceutical industry, catering industry, etc., the health certificate mainly checks for infectious diseases such as hepatitis B and three antibodies. If these infectious diseases have blood tests, they will be checked in the disease management center. Generally, the results can be obtained the next day or the third day, so it can be achieved within three days. Therefore, it usually takes 3 working days to get a health certificate.