For asymptomatic infected people who are most difficult to prevent the epidemic, we can use big data to investigate everyone's whereabouts, so as to carry out crowd prevention and control, without worrying that someone lied about their whereabouts and caused more people to be infected.

0 1, asymptomatic infection in COVID-19.

When novel coronavirus broke out, people all over the world knew that the initial symptoms of COVID-19 were fever, cough and so on. However, as the epidemic situation became more and more serious, medical workers found that COVID-19 had different symptoms and asymptomatic infected people. Then the question is, what is an asymptomatic infected person?

According to the information published by the state, it can be known that according to the Monitoring Scheme of Pneumonia Cases in novel coronavirus (Third Edition), asymptomatic infected people have no clinical symptoms, but the respiratory specimens are novel coronavirus positive. ? To put it simply, a person has no symptoms, but she carries COVID-19 virus, which can be transmitted to others through her.

For example, a woman in Anyang came home from Wuhan without any symptoms, but her family was successively diagnosed as COVID-19. Finally, the doctor had to suspect that she was carrying the virus. Sure enough, when she checked, she did carry the virus, but she didn't have any symptoms.

02. Investigate everyone's whereabouts with big data to prevent and control people.

For these asymptomatic infected people, the state has also introduced policies to investigate everyone's whereabouts. If someone comes back from Wuhan, or passes by Wuhan to see if they are sick or have no symptoms, remind them in time and let them observe in isolation at home. Prevent them from being asymptomatic, so as not to infect more people.

So now we see many places that will let you sweep and see where you have been recently, thus greatly reducing the existence of asymptomatic infected people.