Judging from the mortality reports I’ve seen, the highest risk groups are very young children, children with serious unrelated conditions like asthma and diabetes, and otherwise healthy older children who have engaged in vigorous aerobic exercise like running, soccer and softball a day or so before they went acute.
Importantly, lung damage may not be evident on X-Rays, only CAT scans. And bacterial lung necrosis may be less critical than oxygen deprivation, either caused by fluid and lung damage, or by the thickening of lung tissue, making it less oxygen permeable.
A big drop in mortality has been seen with the use of external blood oxygenation.
So right now, it is still indeterminate whether the mortality is being caused by virus, bacteria, cytokine storm, or secondary effects.
I don’t think there is an ECMO machine in the hospital. I believe the closest to our location is 60 miles away assuming they are not all in use.
I really wish there was more vaccine available.