Got my 3 pack yesterday from Optum (of coarse as requirements into USVI appear to be changing LOL) I cannot see where they have an expiration date......can anyone find one on the outside of their boxes? Do I need the even stronger reading glasses? The odd thing is it says not to open and has a sleeve over the box and an adhesive seal that needs better adhesive.....but the end of the box is openable....but I dare not try to investigate with my luck LOL