Ugh. I would do teaching with your 9 year old and just say I know you're not feeling well and I promise I'll be here for you, but it's really important while you're sick that we try to not let the baby get sick since he's so young. Ask her to try to stay in her room as much as possible (make sure she's super comfortable in there and give her tissues, wipes, hand sanitizer, cough drops, visit her carefully yourself, have her wipe down any electronic devices with Lysol wipes daily, etc.) and clean the bathroom after she uses it, change the towel she uses frequently, don't touch her dirty clothes, let her shower daily if she's up to it and put on fresh clothes, etc. That might be your best bet, to continue to keep them apart. As much as I'm sure your DD loves the baby, I'd probably ask that she doesn't touch her right now, but you can let them see eachother from a distance as long as your DD isn't sneezing, coughing, blowing nose, etc. (See video of sneeze posted a couple of pages back.) It sounds extreme, but if you want to keep your baby from catching it, it may be necessary. But with all that said, I believe the baby should still have some of your immunity, correct? This is such a tough time of year for families with young children.