Having baby on Monday and toddler has hand foot and mouth!!

I'm due to have my baby on Monday and I have noticed my 2 year old has hand foot and mouth disease! My niece has it and she's been playing with her for the last few days and they failed to mention it to me! Now I'm freaking out that my newborn baby will get it! And I'm upset my daughter will have to stay away from her new baby sister 😢😢