The Only Protection Against Smallpox is Vaccination
THE CHILD should be vaccinated at or before the first birthday and again upon entering school. Two successful "takes" will probably protect for life. However, during an epidemic persons who have not been successfully vaccinated within five years should be revaccinated without delay. If smallpox be of the virulent type all persons not successfully vaccinated within one year should be vaccinated at once.
FLORIDA STATE BOARD OF HEALTH
State Archives of Florida: Series S908, Box 01, Folder 20
Pamphlet encouraging vaccination against smallpox; also includes information on how people contract smallpox and who is most susceptible.