I have seen bees outside my hives that have DWV. It's raining today so I was able to get a close look at the front of the hive and saw probably 10 bees walking in front of it with obvious DWV. I have seen bees with it before and have treated about 3 times with powdered sugar. In all of my hive inspections I have not seen a bee on any of the frames inside the hive with deformed wings, but I have seen a few mites, which is why I did the powdered sugar dumps.

My question is do I need to be worried about a few bees with DWV or is it normal?