there is always one death that is unrelated before there are two deaths that are unrelated, then three.....
probably something similar was said when one patient died after taking AFFY's drug
there is a lot of money in this stock right now so there will be plenty of people telling you that nothing is wrong.
it is probably a good idea to keep an eye on the FDA website to see if there are any label changes or warnings added to the label. When a stock is priced for perfection even a small blemish can cause a substantial drop. Biotechs are rather richly priced at this point already.