BREAKTHROUGH THE SAGA OF JONAS SALK by Richard Carter 1965 THE ORIGIN OF HERD IMMUNITY

Page 49. Jonas Salk and Tom Francis explained that the immunization of some students had limited the spread of flu virus in their dormitories, therby reducing the risk of illness among their unvaccinated roommates. This manifestation of what immunologists call the "herd effect," whereby vaccination of only part of a population interrupts transmission of the disease sufficiently to abolish it throughout the population.

Page 351-52. The phenomenon was similar to the "herd effect" noticed by Jonas Salk and Tommy Francis in 1943 after their double-blind test of influenza vaccine in dormitories at the University of Michigan. They had found that unvaccinated students who lived in the same dormitories as vaccinated students caught less flu than unvaccinated students whose dormitory mates were also unvaccinated. Obviously, the presence of a significant number of immunized persons in a dormitory-or neighborhood-affected the spread of infection by interrupting the chain of transmission.

Page 377. Salk reviewed the "herd effect," showing how the inactivated vaccine had protected unvaccinated as well as vaccinated Ammericans.

From the book, Deadly Choices-How The Anti-Vaccination Movement Threatens Us All. by Paul the liar Offit. Page 145. "After enough people are immunized, those who aren't can hide in the herd, protected by those around them."

Jim's comment: Now you know where Offit got that nonsense from.

Jim O'kelly
Founder of the new,
Anti-Vaccination League of America,
and the NO SHOTS NO SCHOOL NOT TRUE movement.
http://www.vaclib.org/basic/polio/salk-fiasco.htm