A.F.
Hi! You are right to want a plan for this. Contrary to what Sue W. and Cindy D. posted, having the shot in not a guarantee to protect you. According to the CDC's report for the last 2 years, the shot was less than 40% effective, leaving a 60% chance of contracting the flu. Not only that but a study from the Mayo clinic was released saying that kids who receive the flu shot are 3x more likely to be hospitalized from flu symptoms than those who didn't have the flu shot.
I am NOT trying to scare you, I just want you to be informed. The great news is that there is alot you can do to protect your family. Vitamin D3 and probiotics are going to go a long way in protecting all of you. We use American Health probiotics and you can get good vitamin D 3 supplements at www.vitacost.com Carlson's makes a great vitamin D 3 drop for kids. Everything I listed can be found at the website I mentioned, AND it's not expensive!
Frequent hand washing is great and make sure that your older daughter keeps her fingers out of her mouth and nose. Fingers in the mouth and nose is the easiest way to give yourself a sickness.
You have to live your life without fear, but you are being smart to not put your faith just into a vaccine. Oh, and feel free to be picky about who holds your daughter. Some people have no concept of staying home when they are sick and still more think that they can hold and kiss babies even though they are hacking up a lung. :)
Proper vitamins, rest, low sugar intake, all these things will go far in disease prevention. I hope you have a wonderful, stress free holiday!