How long is the coxsackie virus contagious for a toddler?

My niece is 1 years old and the doctors first said that she had hsv-1. Based on the cold sores/blisters in her mouth. Then her hands started to have small blisters that weren't grouped together. So then she was tested for hsv-1 and that came back to be negative. So now after her test results came back, it is now said that she has the coxsackie virus. Because she is around my children daily, I wanted to know how long she would be contagious for? It's been 5 days since the blisters in her mouth started. They are still there and the blisters on her hands (about 7 total), but neither seem to bother her as much as it did just a day or two ago.