quick question....

I've got a box o' baby spinach(it's the only kind of salad i'll eat), I ate some last night (before i heard about the e. coli thing) and suffered no ill effects... yet. should i throw it out? kay, on the news just now they say throw it out. maybe i just got lucky. how long would it take me to get sick?

update: chucked the salad. and if this site is right i've got another day before i'm in the clear.