There is no sharp dividing line between rapidly developing acute effects of lead, and chronic effects which take longer to acquire. Lead adversely affects numerous body systems, and causes forms of health impairment and disease which arise after periods of exposure as short as a few days or as long as several years.
Acute, short-term overexposure. Lead is a potent, systemic poison that serves no known useful function once absorbed by your body. Taken in unusually large doses, lead can kill you in a matter of days.
Chronic, long-term overexposure. Long-term overexposure can lead to severe damage to your blood-forming, nervous, urinary and reproductive systems.