Panicking! Newborn was around sick kids

So this weekend we were celebrating Christmas with extended family. This was really exciting as a lot of the family was meeting my LO for the first time (8weeks old). Everyone wanted to hold her, even her cousins! All was great. Then one of the boys got an upset stomach and started to throw up. We thought it may have been from the sugar and running around. 2 hours later his brother started to throw up. So we decided to leave so the baby wouldnt catch it. But it could be too late. Just minutes before one of the boys threw up he was holding my LO and taking photos with her.

Ugh. So now I am convinced my LO will get the stomach bug. Anything I can do for her at this moment to help prevent her from getting it? I washed her hands but that is all I can think of. 😬