Yes, my symptoms actually started 2011 after a resp. Infection, Improved but not back to normal. Same in 2019, improved but less than 2011. Got Covid & pneumonia in Nov. ‘21. Exhausted, dizzy, can’t walk far because of shortness of breath and fall frequently. Rheumatologist diagnosed me with CFS (since 2011) following respiratory infection and of course long Covid is the mother of respiratory symptoms. Just so very tired. Sleep up to 12 hours/day but much better than 20 hrs. when I had first had Covid.