For citations:

Zadorozhnaya V.I., Podavalenko A.P., Operchuk N.I. Risk of an Intensification of Pertussis Epidemic and its Vaccinal Prevention Process in Ukraine. Epidemiology and Vaccinal Prevention. 2015;14(1):78-82. (In Russ.) https://doi.org/10.31631/2073-3046-2015-14-1-78-82