In a clinical setting, asymptomatic means the individual patient is unaware of symptoms. It does not mean their infection by COVID19 has no consequence.
This is a useful review of the most recent studies into asymptomatic infection. They suggest we may have to prepare for long term consequences of asymptomatic infection, even in children.
Growing scientific evidence suggests we need to be far more careful about this virus, but hey, let’s not even bother with masks in school.
www.webmd.com/lung/news/20200811/asymptomatic-covid-silent-but-maybe-not-harmless