Just a note of caution for everyone and hope it is of help to you.
I had just spent a fortnight in Panorama and didn't get bitten by anything.
We left on Monday Night 18th June and joined the large queues outside Bourgas Airport about 11pm. Everyone in the queues seemed to get bitten, flying insects, and next day when I got home I was covered in bites...so the moral of the story, make sure you have some repellent etc just in case...
Bernard