EPIDEMIOLOGY AND VACCINE PREVENTION OF PERTUSSIS
The increase of the incidence of pertussis among adults and their significant role as sources of infection in outbreaks is marked. The presence of light and atypical forms of the disease complicates diagnosis of pertussis, especially at early stages. Not all antigenic substance circulating in the nidus of infection are included in the composition of the vaccine against pertussis (whooping cough), which reduces its protective abilities. Introduction of DPT vaccine creates less stressful and more short-term immunity than the disease of pertussis.