  Enhancement of strangeness production has since long been proposed as a
promising signal of quark-gluon plasma production. A convenient indicator for
it is the Wroblewski parameter which has been shown to be about a factor two
higher in heavy ion collisions. Using a method proposed by us earlier, we
obtained lattice QCD results for the Wroblewski parameter from our simulations
of QCD with two light quarks both below and above the chiral transition. Our
first principles based and parameter free result compare well with the A-A
data.
