For citations:
Simonova E.G., Sergevnin V.I. Pre-Epidemic Diagnosis in the System Risk-Oriented Epidemiological Surveillance of Infectious Diseases. Epidemiology and Vaccinal Prevention. 2018;17(5):31-37. (In Russ.) https://doi.org/10.31631/2073-3046-2018-17-5-31-37