The recent legislative changes by some governments regarding the use of lead, while well intended, is only of significance to an insignificant part of the population. Only those people who bathe in molten(!) or, more importantly, vaporised lead are going to benefit significantly by the changes. Breathing the dust from old lead-based paint as a far greater risk than using solder with a soldering iron.
I used to work in the telephone exchange installation industry in the 70s and 80s and, along with my work colleagues of the day, literally soldered over a million joints. I have not heard of any medical problems as a result of our work. In a unionised workplace, if there were any real concerns, the practice would have stopped years earlier.
The temperatures reached using a soldering iron are much safer than when working around lead with gas torches/burners etc.
Of course, as Rick says, never use your mouth as a third hand, tempting as it can be at times!