I honestly think ive had it last year as quite a few people had an unknown illness in my area with same symptoms I had a very bad cough for a month and no appetite at all and extremely weak I lost over two stone, also its hard to explain a kind of all over body chill from time to time occured something ive never experienced in all my 37 years same with my wife and a fair few of my friends and family.
Went to the doctors to be told its not flu or a chest infection but I couldn't lay down to sleep if I did I couldn't breath and ended up loaning a few spare inhalers from a friend, that started late November and cleared up a week before Christmas ive spoke to some friends who had the exact same symptoms in the US around the same time so I reckon its been around a lot longer than were being told, if it was that I wouldn't want it again it was like flu but on steroids if of course it was that.