It is highly probable this has been here for weeks and weeks, probably months. I believe I had this the beginning of February. After spending most of Jan. in AZ. I returned home via the jam packed flying tube. Less than 48 hrs later I became quickly ill. Same exact symptoms. Dry cough, sore throat, headache and a fever, slight fever but none the less a fever. I was sick as shit for the first three days, and the whole deal lasted about 10. I stayed home as I usually do when ill, drank plenty of fluids and rested. No doc visit as it wasn't necessary.
I have spoken with several people I know who have experienced these exact symptoms over this past winter writing it off as the common flu/cold. In my completely non scientific, not so humble opinion, we are at the middle or end of this, not the beginning. The only reason we're seeing a rise in cases is due to the fact there wasn't anyone testing or even looking for it here until a few weeks ago. If this was spreading as fast as they say, we'd be seeing, have already been seeing, thousands of new cases per day in the U.S. and hundreds of deaths daily. We're not and I don't suspect we will.
Of course this assumes we're getting realistic numbers out of China. If there's ten million dead Chinese in a ditch somewhere, then we have a shit storm of death coming our way.