I was wondering was it possible for the US to design and produce Flak Jackets similar to those that saw use in Korean War, and issue them in sufficient quantities to its infantry during WW2? I am not exactly sure how well developed were the industries necessary for production of the materials needed to create something like a Flak Vest composed out of Ballistic Nylon and/or Fiberglass plates, similar to those that were used in Korean war.
If this is indeed possible to do in this time period, how long of a time frame we may be looking at, from the first prototype to issue on a larger scale? Also, considering that soldiers equipped with it would be at least somewhat more protected from shell splinters and other nasty things on the battlefield, at least to a greater degree then IOTL, what kind of decrease in casualties we may see, considering that Artillery generally was the greatest killer?