I have a question that has been bothering me for a few hours now. I was at the supermarket today, and while i was going to pick up a box of strawberries, the sharp pointy edge of the plastic box poked my thumb. I instantly removed my hand and checked for a prick mark. I saw a small prick mark which was red ( due to the prick )  and some clear fluid oozing out. I am worried about this, as just like it happened to me, what if it had pricked someone else and had their blood on it which might be infected? Is there any risk related to this event for HIV or any blood infection? If so, what should i do next? Also, I'm not sure how deep did the sharp edge of the box go into my finger. I was tested routinely last week and all my STI panel was negative. 

Welcome to the Forum.  this sort of event is not something to worry about.  No one in the nearly 40 year history of the epidemic have been proven to become infected with HIV from an event such as the one you describe.  This is not something to worry about and there is. No need for testing related to it.  Here are some facts which add to the fact that there are no instance in which someone became infected through an exposure similar to the event you describe.

1.  HIV is rare.  Far less than 1$% of Americans have HIV and of those who have the infection nearly half are on treatment which makes them no infections to others.

2.  the HIV virus is a fragile virus which becomes non-infectious quickly upon exposure to room temperature and the environment.

3.  For HIV to infect someone through injection or penetration the virus must reach the blood stream to gain access to lymphocytes, the cells infected by the virus. The injury you sustained did not reach the blood stream.

I hope this information is helpful  There is absolutely no reason for concern and no medical reason for testing.  EWH

When you say blood stream, how deep should it be?? And can a sharp plastic have the potential to cause infection ( for future reference ).  Thank you in advance. 

If anything, there is less risk for HIV in Dubai than in many other parts of the world.

Transfer of infectious material must get INTO the blood stream, like when something is injected using a syringe and needle.  

As I said earlier, I have never heard of anyone contracting HIV from cutting themselves on a sharp edge of a plastic container.  It is not something I would worry about at all.  EWH