The following link leads to a collection of graphs demonstrating the decline of infectious diseases. While some of the graphs actually show an accelerated decline, a majority actually demonstrate a reduction of decline from the introduction of vaccines. What seems clear though, is that vaccinations have not been the sole reason behind the decline in infectious disease, that western countries have been enjoying.
“Figures one (1) through eleven (11) graphically illustrate that in North America, Europe, and the
South Pacific , major declines in life-threatening infectious diseases occurred historically either
without, or far in advance of public immunization efforts for specific diseases as listed. This
provides irrefutable evidence that vaccines are not necessary for the effective elimination of a
wide range of infectious diseases”