[Captain Walker]

If she is asymptomatic or has a low grade infection she can spread this illness to her vulnerable family members FAR more easily than she could if she was racked with fever and bed-ridden; the vulnerable family members would be forewarned and would take steps to survive.

If she has Covid and nobody knows she has Covid, how are these family members safer?

(How can YOU miss such a simple point?)

[entropy12]

No Dr Watson, if she is asymptomatically sick or has a very low grade infection, no one will be even be aware she is infected.

Signed,
Sherlock Holmes