Basically, what made the Spanish flu so deadly. Somehow, young people seem to have been mostly spared. So far.
If you look at official Chinese numbers. I saw one picture of an apartment room with a dead family. 3 or 4 children and a mother. The one chart I saw 2 weeks ago that listed the dead only had a 28 year old as the youngest. Most of the dead on the chart were over 65...numbers grew fast the older you got. You can not trust what the Chinese are saying on anything though it might be true children are not as badly effected.