There is not evidence for this.
Beings that, before the era of immunizations, millions of people died yearly
from polio, tetanus, diptheria, pertussis, measles, rubella, mumps, HIB, chicken pox, lets all presume Dr. Shaw and Jenny McCarthey are right and we stop immunizing. If we did, the epidemics of all these diseases would return within a couple years and we would look back on the era of immunizations with longing. These diseases are not erradicated.