question: What is the answer: First developed by John Salk, the vaccine for which childhood illness was first tested in 1952?
answer: poliomyelitis

question: What is the answer: The Kalahari Desert is on which continent?
answer: africa

question: What is the answer: Of what is Petrology the study?
answer: rocks

question: What is the answer: Name the illness caused by a reaction to gliadin, a gluten protein in wheat, barley, rye, etc?
answer:
coeliac disease