I think it would be prudent to be hesitant towards there being an epidemic or approaching epidemic.
For one, journalists are alarmist by nature. Turn on almost any newscast and you will hear about the latest danger of the week--I wouldn't be surprised if next week it's dangerous to sit in a chair. Journalists are gullible, have the task of regularly filling in the news gap, and they have resumes to build. They are all on the beach sifting through sand looking for the big golden beach ball.
Second, the claim of "epidemic" is based upon a few thousand people who self-diagnosed themselves.
Third, Occam's scalpel slices that before you define a new disease you must first rule out known diseases. People with this "disease" are diagnosed with a wide range of disorders, there is no one symptom which everyone has, and different people supposedly have different bugs of different species--flies, ticks, worms, etc. Diseases can be caused by different strains of bacteria or viruses but those are variations of the same basic organism and it seems a far stretch to claim entirely different organisms are causing the same disease.
The Youtube video linked atop this thread must be outdated because one year ago the CDC did launch an investigation. Before the investigation was launched, it should be readily easy to see why the CDc was justifiably hesitant to expend their resources on the claims of a small handful of people whom give their doctors ziplock bags of what appears to be carpet fiber and whom may more plausibly have a known disease. Also, both the New England Journal of Medicine and the Journal of the American Medical Assocation make no mention of "morgellon"... are we then to suppose they, too, are in on the "conspiracy"?
There is a galaxy of parasites out there; scrape the skin of any healthy individual and under a microscope you will see it swarming with life. I am no doctor and thus will leave the question to medical organizations of whether a new disease exists... but not journalists, not their write-in patients, and most definitely not conspiracy theory buffs.