Why is there no national unification of health codes?

First, at present, different provinces have different risk levels, response levels and prevention and control requirements. Secondly, the standards for generating "health codes" vary from place to place. Some are connected to the query interfaces of platforms in various countries, some are based on the travel trajectory of the parties, and some are self-reported according to body temperature. Thirdly, the health code can only prove the physical condition of the subject at that time, and the subsequent health status cannot be simply judged accordingly.

Compared with before, COVID-19 is more special and more difficult to prevent and control. The key lies in the close cooperation between the input and output places of migrant workers, so that the routine epidemic prevention work is firmly in place. On the one hand, "code plus code" is definitely wrong, on the other hand, the environment and conditions of "one line and one code" are not mature.

At the national level, the risk data service of epidemic prevention and control in COVID-19 is carried out nationwide, and all provinces and departments can call and query the unified database of confirmed and suspected cases, close contacts database and county-level risk grade database, basically realizing mutual recognition of basic data.