The WHO believes that typical vaccines have a death rate of 1:100,000 to 1:1,000,000.
In the US , there are anywhere from 5m to 10m children/young immunized per year, each with multiple vaccines.
So, according to peer reviewed study as per the WHO, vaccines do carry a real risk.
In many countries, especially our own, the chance of dying from a disease (1 in <500 for polio, 1 in 2,500 for mumps, ect) taking a vaccine was a very reasonable thing to reduce the number of people killed.
So, in the US , how many people die from vaccines? No one knows because they don't keep those records, WHO stats would estimate anywhere from 10 to maybe 100. It's not alot, but they do believe they exist.
So, how many people die from polio, measles, mumps, rubella and other diseases that are vaccinated against? The answer is zero.
Well, what's the casualty rate from such diseases in the US when they afflict those who aren't immunized? Well, as of today I haven't found a single case of anyone dying from such diseases in 5 years ,even though hundreds to a few thousand of each disease are discovered each year.
So, risk of death from vaccine 0.1%
Risk of death from immunized disease 0%
Could we reach a point where a particularly nasty version of a virus is needed to be immunized against? Absolutely. Could the lack of immunization start causing death? Sure, but it hasn't happened in the US from my research at this point yet.