Objective To ascertain antibodies level against Bordetella pertussis whole-cell in healthy primary and secondary school students and adults in Hongkou District,and to provide evidence for the prevention and control of pertussis. Methods The antibody levels against pertussis whole-cell in primary and secondary school students and adults( including pregnant women) in Hongkou District were determined by quantitative ELISA. Those with immunization history of pertussis vaccine and continuous cough history for mo...