K.,
You've gotten some great advice, and so to add to that...keep in mind, that it takes a good two weeks for cold/virus to completely leave the body. So, even if she seems like she's okay, it might still be lingering.
My son (2.5) always goes through about a month of strange eating when he's sick. I just make sure to keep soft foods on hand, like yogurt, rice, pasta and things like that. Don't worry she won't become malnourished, she is at least drinking the milk and taking in some protein. What I do is offer my son a few staples, like rice, chicken and a veggie and then try to introduce the new foods to him after he's been sick it takes longer for him to be okay with eating regular meals.
Also, this age is ideal for tastebud changes. Toddlers are picky by nature, since they are still learning what solids/table food really is and not sure about textures and colors. Keep meals simple, and if she doesn't like it now, keep in mind she might in a few weeks.
If you are truly worried about her diet and intake, call your Pediatrician and ask some questions...it doesn't sound like food allergies, I have food allergies and it just sounds like she's getting over a cold and being a toddler.
Good Luck!