I live in an apartment and didn't receive notification that my yeast had arrived for 3 days after it got to the office. Normally, I'd just toss the vial of yeast and go to my LHBS to get more, but this is the Antwerp Ale yeast (Platinum Strain, not currently available at my LHBS).
Though I had an ice pack shipped with it, the yeast vial likely sat there for 2-3 days at room temperature before I was able to refrigerate it.
Is the yeast still viable? I'll be making a starter but would prefer not to have to make a brew day run to get multiple vials/pouches of replacement yeast in lieu of a starter.