Yes, I had both long flu and long pneumonia. In both cases it took me about 2 months to fully recover after being officially cured. It annoys me a little that people are only now discovering that respiratory illnesses can have long-term effect. How many people know that pneumonia can increase the risk of heart attack?
Personal experience aside, it will be important to put specific numbers on the phenomenon and establish a baseline for comparison to other illnesses. So this announcement of a research effort is good news. I just hope they will put the numbers in context.