Caught it during July 2021 just two days before my planned second dose (Italy's vaccination rates were quite slow back then), had fever at 40 degree celsius for around 3 days, and around 38 for the next week. Luckily very mild cough. Paracetamol had no effect when symptoms started.

No idea on the long term effect, but surely I will remember for a while being delirious for three days straight.