Fair enough.
But how do we know those that have died weren't sick, or susceptible before hand?
I'm in the vast minority here but I still think this whole "pandemic" as it's being made out to be is a massive overreaction.
But that's just me
It's a combination of health records and post-mortem testing.
The "Pandemic" thing just means that it has spread over the world in large enough portions.
As far as kill rate goes, it's actually pretty low. We still don't know how much but based on countries like Korea and Germany who do heavy testing, it seems to be about 1% - 3% when the hospital system isn't under too much pressure. Unfortunately that number rises drastically when the hospital system is under heavy pressure.
For reference, the seasonal flu has a kill rate of aroun 0.1%, so this is about 10 to 30 times better at killing than the seasonal flu. But the main difference here is that even though young people are dying, the vast majority are older people. The seasonal flu on the other hand kills a higher percentage of younger people but a lower percentage of older people.
Also important to note that we actually have a vaccine for the seasonal flu. Otherwise it would be much worse.