I had the J&J last June and Omicron this month. Meh. Don’t know if the vaxx did anything but it was just like ppl said it was. Mild symptoms. However the pneumonia that came with it was difficult and lingered for 3 weeks even on antibiotics. Other ppl at work had the same lingering cough.
I had the lingering cough with the flu several years ago. Three months before it was out of my system.