There was a really bad flu that went around just before Covid. It was a bad enough flu for me that I actually had to take a Ventolin inhaler. When I finally got covid in late 2022, I would say the flu I picked up in 2020 was worse.
We can only guess, RSV also seems to have worse effect on people than covid and flu and it is not uncommon to encounter this monster. Unless we have the sample of the pathogen to analyse, it is all hearsay.
