Like many such virus spreading mails, this one has some apparently well researched social engineering tactics; the mail contains the correct contact information for a Fifa official, and seems fairly authentic.
Currently, it appears that there is some disagreement as regards the risk of this. US firm McAfee classified the virus as a "medium risk", whereas Trend Micro placed the virus in its "red alert" category, pointing out that the virus could be spread in either English or German. Panda Software had a view similar to that of Trend Micro.
In any case, watch what you open. Keep your virus software up to date with the latest patches, and donít open any attachments that do not come from a source that you expected to get files from.