Hi. Long post alert, very sorry! So, I'm 35, x smoker (2 years quit), I was running 25 miles a week, quite fit really. But... end of January I developed very sudden breathlessness for no apparent reason. This stayed for around 4 or 5 days then went of its own accord. Started running again with no ill effects. A month after the initial breathlessness and boom! It's back with a vengeance! After a course of anti biotics, 3 courses of prednisolone, 2 clear chest x rays, and 3 normal blood tests, and nearly 6 weeks later, I still have a tight chest! Not as bad by a long shot, but it's still tight! Hospital suspect asthma, gp thinks virus. I had a swab done at the hospital and coronavirus hku1 was detected, although no one seems to know the significanceof this. Any ideas?! Help!