Every one of those has a "may" in there. Sure do the research, but right now these studies have show 0 evidence that it's actually a significant problem. They literally read like "people who shoot guns are idiots". Just look at how people are responding in this thread. I'd like to see the study actually go and test clothing and how much lead is aerosolized with each common type of primer/caliber and from someone shooting more than 30mins.
"Most reported shooting monthly or less (94%) but for ≥30 minutes (91%); 32% primarily shot indoors."
Lead in soil is a much bigger issue in cities from years and years of leaded fuels/leaded paints.