Mayo Clinic: Whooping cough http://www.mayoclinic.org/diseases-condi... pertussis whooping cough whooping cough whooping cough whooping cough (pertussis) some major cases, death in infants some major cases, death in infants some major cases, death in infants hacking cough followed by a high-pitched intake of breath some major cases, death in infants Pertussis Mayo Clinic: Whooping cough whooping cough whooping cough some major cases, death in infants whooping cough whooping cough mayoclinic.org whooping cough most deaths occur in infants some major cases, death in infants