Right, as you've got answers which say either yes or no, my answer is maybe!
It's very relative; you can only work with what you have (as per pleinolijf) is correct, but it doesn't mean you can't fix it. Fixing a blur is subjective - what is the end result, does it have to be perfect or just recognizable (for example, give me a blurred picture of a brand name on a can of drink I can probably work out the brand name).
So, if the blur is strong/drastic then I think you can't fix it;
If the blur is fairly subtle then it may be possible to at least improve it. However, the fact you are asking this question suggests you don't possess any digital graphic skills in this area and as such may be un-realistic.
So, if you can, re-take the picture. If not, then you could quickly try some free online tools to get an idea of what can be done quickly (in a search engine, type "auto fix blurring online tool"). Or, you may want to search for graphic designers and get some prices.