During the epidemic, the mobile phones used by secret-related personnel belong to special telephone numbers, which generally start with 1 1 in China, and are equipped with special service numbers, such as Fei Jing 1 10, fire alarm19, etc. At the beginning of 12, give the special civil numbers, such as 120 (hospital),121(weather forecast), etc.

The purpose of mobile phone calls is to effectively prevent the spread of the epidemic. The information collected through mobile phone calls can play a key role in effectively curbing the spread of the epidemic, and it will involve inquiring about personal information, health status, travel history of epidemic areas, living history of epidemic areas, means of transportation and other useful information for disease prevention and control.

It is a special telephone form, which is convenient for quickly and directionally notifying the secret receiver to transfer. If you receive such a call during the epidemic, you should pay attention to distinguish between true and false, and actively cooperate with the work flow of relevant protection departments.

epidemiological investigation

Also known as epidemiological investigation, it refers to the investigation and research conducted by epidemiological methods. It is mainly used to study the distribution and determinants of diseases, health and hygiene events. Through these studies, reasonable preventive health care countermeasures and health service measures are put forward, and the effects of these countermeasures and measures are evaluated.

From the perspective of logical reasoning, people's ways of understanding things can be divided into induction and deduction. "Epidemiology is basically an inductive science" (Frost 194 1). Epidemiology embodies its induction from two aspects: "description" and "analysis", with emphasis on analysis in description and throughout description in analysis.