There are three kinds of health codes: green code can be directly input, red code can be isolated for 14 days, and yellow code can be isolated for less than 7 days. The health coding system has formed a set of standards, which can be quickly introduced according to the needs of different regions and the needs of epidemic prevention and control in various places.
Wuhan health code has only one color, which is black. Wuhan health code does not need to punch in, just need to report the health file. Therefore, the color of the health code has no special meaning, and it is only used as a health record.