About 40 percent of the pre-1978 homes in the USA have some lead-based paints in them. Lead-Based Paints (LBPs) become hazardous when they're damaged or chipped. Airborne lead containing particles can then enter the lungs and cause a number of blood-related problems. Lead can also enter the body by eating or ingesting LPB chips or dust.
As long as the lead painted surfaces remain sound or in good condition, a lead risk doesn't exist.