a couple of years ago i had the symptoms of a virus for three weeks. temp would go up and down and extreme fatigue would hit when the temp was up. my doc finally did a blood test which showed that i had had west nile in the past. a couple weeks later the health dept required another test because they weren't sure that it was an old virus. i remember about a year before i was bitten by mosquitoes several times in a 2 day period and that about 10 days later i didn't feel well for a few days. i am wondering if the virus leaves a lasting problem like malaria where it will flare up now and then.