Which scientist established norms and expectations for future vaccine trials while developing the whooping cough vaccine?

• A. Jonas Salk
• B. Louis Pasteur
• C. Pearl Kendrick
• D. Edward Jenner

Answer: (C)

The idea being tested is who helped shape how vaccine trials are run, not just who developed a vaccine. Pearl Kendrick stands out because, with Grace Eldering, she led the early development of the whooping cough (pertussis) vaccine and, critically, set up rigorous, real-world methods for testing it. In the 1930s in Grand Rapids, they carried out community-based trials, carefully tracking outcomes, monitoring safety, and documenting results for public health authorities. This approach—planning trials, evaluating both safety and effectiveness in a real population, and reporting findings transparently—gave future vaccine trials a practical blueprint and standards to follow. While other figures listed made major contributions to vaccination history, Kendrick is the one linked to establishing the testing norms specifically around the pertussis vaccine.