Earlier quoted context omitted.
It's the asymptomatic spread that has caused a lot of the problems and concern. People with ebola for example rarely spread it because they become so quickly and acutely ill. But with COVID, you're going about your normal life for days while spreading it unknowingly before symptoms hit (if they even hit at all).
> It's the asymptomatic spread that has caused a lot of the problems and concern. Is there a lot of evidence of this? Last time I checked, asymptomatic spread was not well understood.
Here's a couple relatively recent links: https://wwwnc.cdc.gov/eid/article/27/4/20-4576_article
https://www.health.harvard.edu/diseases-and-conditions/most-...