What? Kids who have the virus absolutely transmit it to others, they themselves just aren't effected much. Being asymptomatic doesn't mean not being infectious.
By now we understand fairly well how it works: The more coronaviruses you have come into contact with and accumulated antibodies against during the course of your life, (=generally the older you are) the harder covid-19 hits you. Worst case scenario: it can cause cytokine release syndrome (CRS) in your lungs (filling them with intracellular fluid, lymphocytes) causing respiratory distress.
I'm not sure about this.
For starters, it is way to early to call multiple things, fatality, complications, and symptoms are being researched along with transmission and you say the mechanics of mortality is understood fairly?
People are generally immunologically naive to this, barely anyone has exposure to the closely related SARS. Not overloaded on antibodies.
CRS tends to be a threat for younger people, not older as they'd fight off the illness otherwise.