Don't despair just yet mate. Even the elderly and frail generally survive this. Their chances are nothing like so good, obviously but even so the vast majority of them recover from it just fine... assuming they even catch it in the first place.
We have to be positive and it has to be remembered that not every person over 80 who gets it will die. The biggest point of optimism is we have no idea how many actual cases there are and within that we have no idea how many people have it and are 80+.
We do know how many are dying though and we do know that it is likely millions have it and that will include a big chunk of the elderly. Even if you only consider the confirmed cases alone then the death rate is still around 21% which whilst awful.. It's still a fighting number.
I wouldn't rule out the older generation because even the worst of this is survivable and the odds are in their favour, even more so if they can get access to care.
That latter point is why all the twats messing around outside need to get inside NOW.