TY JOUR TI MODERN EPIDEMIOLOGICAL FEATURES OF WHOOPING COUGH IN THE ASTRAKHAN REGION KW pertussis KW the incidence of pertussis KW the epidemiological significance of pertussis KW vaccination of the population JO CASPIANJOURNALOF MEDICINE AND PHARMACY AU Spirenkova, A.. AU Shendo, G.. AU Ugleva, S.V. AU Akhmerova, R.. PY 2020 IS 1 PB Astrakhan State Medical University