The picture shown below gives a visual image of how the number of vaccinations have increased over the years (it is used with permission).
This is 4 generations of women: great-grandma through great-grandchild.
From 1rst to 2nd generation vaccines increased 3.5 fold.
From 2nd to 3rd generation vaccines increased 2 fold.
From 3rd to the 4th generation they increased 4.9 fold.
From 1rst to 4th they increased 34.5 fold.
Please note, 69 vaccines is just what is required for childhood - this does not include the additional doses one would receive if you continue to receive all recommended vaccines throughout your life according to "the schedule".
What is unknown is how many more vaccines will be added to the "schedule" (there are currently >200 in development). It is no surprise that there was such a large increase between the 3rd and 4th generation as it was since the 3rd generation was born that anything related to vaccines (from manufacturers to those who recommend or require them to those who order/administer them) received blanket immunity from liability related to any adverse reactions that may occur as a result of vaccination (though how that would happen when a product is "safe and effective" is anybody's guess).
Vaccines are categorized by the FDA as "biologics", and as such, their approval process is different from other drugs. They are not required to undergo randomized, double-blind trials to demonstrate either safety or efficacy.
Do we know how many are safe or if it is safe to combine vaccine antigens in one shot or if it is safe to give multiple vaccines at one time? No. These questions have never been asked in research. Have vaccines been studied? Oh yes, exhaustively. But science has gone post-modern, and no where more so than when the issue in question is vaccines. The answer is pre-determined and the study is designed to provide the desired answer. We have yet to do the type of study that would provide some very interesting and very important answers - namely, a long-term study comparing health outcomes in vaccinated individuals with unvaccinated individuals. Unvaccinated defined as having never received any vaccine - not having not received the vaccine in question!! Vaccinated being defined as having received >0 vaccines. In these studies health needs to be defined more broadly than not getting "x" disease or infection.
The number of vaccines that are necessary should be determined by the person receiving them (or the minor child's parents) - not by government, not by a school system, nor an employer.