There is a great difference between the needs for Epipens for Severe Allergic Reactions and Vaccinations against communicable diseases such as Measle, Rubella, Whooping Cough, etc, etc.
So do NOT get them mixed up for starters.
It only takes for 1 single, unvaccinated child with a very early onset of Measles for example, undiagnosed by the parent/s to go to school or a pre-school and it WILL not only infect every other child there but every OTHER child/Adult it comes in contact with, then the contacts expand exponentially as each subsequent child contacts other children and adults in turn.
Whereas Severe Allergic Reactions, such as Nut Allergies for example, like Cancers are NOT communicable in any way, shape nor form.
No-one knows for certain exactly how many people died BEFORE vaccines for Smallpox were discovered, the same applies for the Great Spanish Flu Epidemic in the early 20th. Century as well.
Before vaccinations for Poliomyelitis were discovered and used Polio was responsible for untold deaths, cripplings, etc, of young and old world-wide just as has been Measles, Rubella, Whooping Cough and a very vast range of other now preventable diseases.
Yes, a quick jab with a needle during the vaccination process can be a sometimes painful shock to a little child/baby BUT dying from the disease that was preventable is far, far worse than you can ever hope to imagine and you CAN trust me on that one since I've, a nurse, seen first-hand, and very sadly as well, what these poor little children go through before they finally succumb to the disease and die, IT IS not a pretty sight in the least.
In 1972, my eldest sister blatantly refused to have my nephew, Grahame, vaccinated against Measles, etc, simply because, in her exact words, " It was inconvenient for her to have to take him to the Doctor at the time," 3 months later, after Measles went through town like a runaway train, Grahame contracted Measles which in turn resulted in him having Meningitis as well, it took the poor child, only 2 years and 4 months of age, 3 whole weeks of pain and SHEER agony to die very, very slowly despite Doctors doing absolutely EVERYTHING in their power to try and save him from a death that was 100% preventable.