It's not that specific flu. But it was far closer to being "just a flu" than something serious like the spanish flu. Also, it's a study on mice. Pretty much worthless when it comes to humans.
Do you work for a newspaper or something? Why do some people want covid to be the worst thing ever. Can't be happy it turned out to be "just a flu".
Honestly, what's your agenda? Why are you so heavily invested?
My thing is that I have a heart condition that is highly exacerbated by covid, so people treating it with no caution (sneezing in my face these days, no care at all anymore) is very worrying for people like me. A flu, however, I'm totally fine with catching.
It's complicated. You have the ability of the virus to infect particular tissues. Sometimes viruses have a primary and secondary attack. What the viruses life cycle is in the host. Chicken pox's isn't influenza's. There is the ability of the virus to evade and suppress the immune response. And finally you have the point that viruses can trigger autoimmune responses.
I saw lots of back and forth about neurological stuff. Best response was from someone that studies neurology that pointed out that 'the brain' is made up of dozens of cell types. Viral damage or an autoimmune attack on any of those can be very ungood.
Also I think about 50-60 years ago the medical profession lost interest in respiratory viruses. So much information is absent, out dated, or the result of 50 years of telephone.
Wait what? Really?
So it's not just a flu.