All the links in my original post are the basis of my claim - the WHO finding in China is very plausible and says exactly what I say - so saying I have "no basis" is clearly misrepresenting my above post.

I believe I'm characterizing your claim and their links as well as I can while vehemently disagreeing. As far as I can tell, you cite a survey finding many asymptomatic cases and think that proves things will stay that way but fail to consider the properties of a growing infected group. I'm entirely hostile to your position but I know only substantial arguments can help here.

My main goal is to make clear the urgency of this situation. There's a debate about whether the virus needs to be actively suppressed and I want to make it clear that this is indeed necessary. Basically, not seeing the American Health Care system collapse and hundreds of thousands of people die is my motivate. For that, we have to realize how many people will be coming in (though that's visible in Italy).

You talk of "engaging with the facts" but you don't present either facts or arguments in this post - plus alleging motives, etc.

Edit: Looking further at your link, you're describing the (important testing approach in the village of Vo). You can say "as 10%" were symptomatic but this is in the context of the virus being spread by them, again, not in the context of the people not getting sick later. There's really no reference to exactly what percentage of people go seriously sick.