If you mix them yourself, or if you get anything above 16mg (1.6) [2.0, 2.2, 2.4, 3.2] of nicotine, it's possible ...
For the general populace, if you get 8mg (.
or lower, there's little risk ...
MOST people know to wash their hands if it gets on them;
they also know to keep shit like this out or reach of children ...
Those that don't; well .... "natural selection" ...