The development of the epidemic also prompted the epidemic prevention and control continue to be improved, especially the emergence of big data, the epidemic prevention and control played the following several very important role:

Short time to risk tracing. When the epidemic just appeared, there is no big data for epidemic prevention and control, people can only rely on the local community to travel to the health card issued by the health card, and the health card may be up to one month of the use of the period, obviously does not have the scientific nature. With the emergence of big data, people need to use their cell phones to scan the code to register, once an outbreak occurs in a certain area, the relevant government departments can be the first time to use big data to carry out the risk of tracing all the close to notify the staff in place at the first time and isolation, which plays a very critical role in the prevention and control of the epidemic blocked.

Big data doesn't leave anyone behind. A full-scale nucleic acid test will be arranged once an area is at high or medium risk, but to conduct a large-scale nucleic acid test in a large city requires a strong mobilization capability. At this point, big data still plays a key role, if the individual does not participate in the required nucleic acid test, the big data system will automatically for these people's health code will turn yellow. Once the health code appears yellow, want to go out to work or for other things is very difficult, in addition to the usual daily scanning code registration work, the big data has already stored their own registered cell phone number, the government can directly call the phone on the individual questioning.

Big Data keeps track of everyone's movements. Every holiday season is a huge test of outbreak prevention and control, with health code registrations at many public **** malls and public **** stations. After an outbreak in any province, for example, staff will use heat maps of big data to show which people have traveled to which areas in the past 14 days and how long they have stayed in which areas, all of which can be investigated.

Overall, the Internet era has played a great role in helping to prevent and control outbreaks, especially big data, for large-scale personnel mobilization and population surveys is with a very good side.