Most Helpful Girl
If you didn't tell them it never happened. You would have needed to report it when it happened if you wanted them to have any liability, but without a report it could have happened anywhere.
Since you didn't though the first thing you should have done is get a tetanus shot to endure you did not get that and then test further if needed. Had you reported the incident the store quite possibly would have had to pay for any medical bills that were within reason.
Most Helpful Guy
if you find a baller ass lawyer who is also willing to take the case and can find every major loophole to get you that win then sure go for it but if not then I highly doubt you'd be able to sue. IF you do contract some kind of HIV then you have a stronger case but you don't know anything as of right now so go get some answers first before thinking about it. get checked up. why make a bigger problem before knowing?