“whooping-cough” Charts
Reported Cases of Pertussis (1976-2004) »
Rates of pertussis (whooping cough) dropped dramatically in the 20th century after introduction of the pertussis vaccine. Recently however, pertussis…
Rates of pertussis (whooping cough) dropped dramatically in the 20th century after introduction of the pertussis vaccine. Recently however, pertussis…