DR. GARTH WILKINSON’S CATECHISM.
Q. When Whooping-Cough is not rife, what is that due to?
A. Nature.
Q. When Scarlatina is not rife, what is that due to?
A. Nature.
Q. When Cholera is not rife, what is that due to?
A. Nature.
Q. When Smallpox is not rife, what is that due to?
A. Vaccination.
Q. When other diseases in the course of time have become mild or died out, what is that due to?