Does she have a mask? She needs to wear it and touch NOTHING in the Atlanta airport.
If I were her, I would rent a car and drive it
She could bring more stuff home if she did that.
Just tell her to spray the interior of the car with lysol or something. And let it sit for a bit before she drives.
And leave the vents closed.
She is armed with many wipes.
I told her to wipe her luggage down liberally. To get it wet and wait for it to dry.
Then her sister will pick her up at the curb.