As far as the death with "no underlying conditions" issue is concerned, my own take on this is that there quite obviously ARE people within the medically "healthy" spectrum that this virus can take out, whereas there are some who can prevail and recover alongside those who show little to no symptoms or negative affects.
Not professing any medical expertise here, but there is obviously "something" unique to each individual which aside from any "underlying conditions" or not, is predisposing everybody to varied outcomes in the event that they contract the virus.
Either this, or else there are "degrees" of severity at which even "healthy" people can become overpowered by the virus....IE The heavy cold, as opposed to just a plain old cold.
I know these are just our layperson figures of speech which we use to try and explain the severity of our seasonal maladies to each-other etc...but I wonder if there ARE degrees in severity to this virus, and whether or not it is in these instances that even relatively healthy people can succumb and be overpowered by it?
If however, there are NO significant "degrees" of infection, and you either catch it or you don't and thereafter, it's just down our individual immune systems fighting the good fight for us, and either winning that fight or losing it.....then doesn't this present a kind of secondary reality to this virus which means that...
.....even though it presents a much more diminished fatality rate amongst the "healthy," it will still stalk the "healthy" and for what appear to be lesser understood reasons.....it will still overpower SOME who contract it.
I guess what I'm saying is that whilst the focus is understandably on the vulnerable demographic, this virus is also having (albeit lesser) success with those who are deemed to be "healthy."
So not to sugar coat this, an unknown section of the "healthy" are unknowingly vulnerable to this virus, and (pre-vaccine-availability).... totally dependent on their own immune systems or predisposed biology as to whether or not this virus may become either a killer, or merely something that gave them some rather mild and temporary symptoms which soon abated.
So as the reports continue, and these cases of "no underlying symptoms" or even the non-typical age group deaths are reported, it should be noted that, however non-typical, this is ALSO part of this virus's repertoire and what it's capable of.
Statistically, the "healthy" may be a less at risk demographic, but there obviously IS still some risk and some will be compromised.
Ending on a positive note however, knowing this, realising it and accepting it....should just make us all the more vigilant and pro-active in maintaining our health with good diet, exercise and any and all positive strategies we can muster to boost our immune systems to the max.
If the virus finds you, then let it find you "ready for the fight."