Here are some links to contrary views. Decide for yourself.
Nothing new.
Metallic lead is not a significant hazard unless very finely divided.
Wash your hands after handling lead, and use indoor ranges with good ventilation.
There is even a medical study that purports to refute the 'lead bullets do not cause lead in the body' that surgeons have operated on for a very long time.
Of course when you actually look at the data presented in the study you can see that lead particles from a gunshot cause a small rise in blood lead levels (and more lead surface exposed causes a greater rise) the level then starts to decline as the surface of the lead is passivated by the body.
They also found the well known issue with lead bullets in synovial fluid (the fluid prevents passivation).
Wash your hands thoroughly, and do not smoke while handling lead.
The metal on you fingers can be transferred to a cigarette and then vaporized as you burn the dirty portion of the cigarette.
Do not use a flame to speed up lead melting.
The temperature is high enough to create significant lead vapor.
Keep the pot below around 750F.