Just what you want to see when you're pregnant or trying*

Posted prominently on the subway platform where I wait for the train every evening going home from work:

WARNING!
LEAD WORK AREA
POISON
AUTHORIZED PERSONNEL ONLY
NO EATING OR DRINKING

I think the sign was referring to a boxed-in area beneath a stairwell, but it's not like that area was hermetically sealed or anything. Which led me to wonder, if I hold my breath and make myself as small as possible, can I somehow keep the lead dust from sticking to me?

*or, you know, if you're a living human at all