We do not know this answer yet.
It also depends on what age groups we look at.
Two years and younger clearly appears to be rare, but to say it does not happen at this point is stupidity.
Realize NO ONE can actually see the virus go from one person to another and then causing symptoms. It all has to be reasoned through contact studies, which are getting very difficult right now because so many people have this thing. In fact we may have to give up on this all together, it would have been very effective if we had contained this early on.
You are wrong.