I call:

Call me a country with a developed culture and no implanted vaccination that has problems with infant mortality. I do not know such.

The United States. In 1979, an outbreak of paralytic polio was in the Amish community that did not practice vaccination. Since then, 162 cases of the disease have been recorded in the United States. The number, of course, is small, but these 162 people are not easier than that. And now imagine that all the surroundings of these people are not vaccinated, and your child included. Some left-handed guy sneezes at him in the transport or on the street - and all, hello.