Whooping cough is especially severe in children in the first months of life - with attacks of apnea, pneumonia, atelectasis (25%), convulsions (3%), encephalopathy (1%). Vaccination against whooping cough, carried out in children in coverage of more than 95% in Russia led to a decrease in the incidence from 19.06 per 100,000 population and 91.46 per 100,000 children under 14 in 1998 to 3.24 and 18.86 in 2005 and 5.66 to 34.86 in 2007, respectively.