The answer may shock you. In 1986, Congress passed a law granting legal immunity to vaccine manufacturer, but only for vaccines on the childhood immunization schedule.
Since then, vaccine makers have worked to push as many vaccines as possible onto that schedule for the sole purpose of enjoying legal immunity from lawsuits for faulty products and vaccine damage.
The skyrocketing number of vaccines now given to children, in other words, has nothing to do with science or medicine. It has everything to do with maximizing profits and shielding vaccine manufacturers from lawsuits for all the millions of children their products continue to maim and kill.
Del Bigtree explains more in this Brighteon video that has been banned across all the tech giants and social media sites: