Carilion has issued an update on flu cases so far this season. In the past two weeks, flu numbers have caught up to last year. One chart showed that the flu outbreak was a couple of weeks later this year than last year, but Carilion officials have recorded the same number of cases as at this time last year. The flu shot is 68 percent effective this flu season — much better than the last two years. In this area, about half of the cases are for patients under the age of 19 and half are over, but the older age groups are more susceptible to complications.