Why do you claim that?
Being asymptomatic doesn't mean you are 'no risk at all'. At the height of Covid people with the virus but no symptoms were infecting others at only a marginally lower rate than those with symptoms.
https://www.thelancet.com/journals/l...059-4/fulltext
If you mean they no longer had the virus 2-3 months after their infection and therefore have no symptoms, then yes - no risk. But 'asymptomatic' doesn't mean that.