Hello Amoorah,
I believe the 20% chance is really high and just a random number picked. The chances of you catching a virus is only a number if someone used the product before. The chances are *near* zero if it has never been used before. If the company you bought it from resealed it after someone used it and returned it, then you have an issue. But sometimes anti virus software will detect things that may not be a virus.
Try typing in your model number of the Corsair drive and type in mcafee and see what your turn up. If there are others that have reported it, then I think you should be fine. If not, return it and get another one.
Google Search for: Corsair 16 GB model number + mcafee
Just like typed but replacing Model Number for your model number and leave the + sign.
Good Luck!