Is SMS tracking epidemic situation big data accurate?

Big data SMS is the information sent by the Municipal Center for Disease Control and Prevention through big data screening. Big data shows that there may be contact with cases or asymptomatic infected people in COVID-19, or contact with the environment or articles polluted by COVID-19, which is still very accurate.

Big data, or huge amount of data, means that the amount of data involved is so large that it can't be captured, managed, processed and sorted out within a reasonable time by current mainstream software tools to help enterprises make more active business decisions. Enterprises need to ensure their own and customers' data from a new perspective. All data needs to be protected at the beginning of creation, not at the end of data preservation. Facts have proved that only strengthening the latter's security measures will not help.