Be very careful. Even if the allergy being triggered was a result of the virus, once you’re sensitized, you’re sensitized.
Maybe you can test by rubbing some on her skin and see if she raises a welt.
Or talk to her doctor and see if you can challenge her under medical supervision. Or just plain have her allergy tested.
Once the food is in you, it’s in you and it takes a couple days to work its way out.
thank you. I will call her doctor before I try the milk again.