Health code vaccination does not display manufacturer information.

1. Duplicate data: If the vaccination information of COVID-19 vaccine was displayed in the previous health code, but it suddenly disappeared, it may be because the individual's COVID-19 vaccination case is duplicated with the previous vaccination case, and the data will be merged and duplicated to cover the vaccination case information of one party. At this time, you can contact the vaccination unit to verify the recovery.

2, the signal is not good: the information of vaccination requires a network signal. If the cell phone signal is not good at that time, it will not be displayed, and it is generally necessary to restart and refresh.