I totally hear you... I worry about all the socializing and being exposed to things too, esp. since holiday parties tend to revolve around food. I can't stand buffet style things.
I wanted to add that my birthday is Christmas Eve and I have always wished I had a summer birthday so I could honestly enjoy myself without all the panic in the back of my mind about emet at this time of year.
We just have to remember our handwashing and that sort of thing and hope for the best....
In memory of the sweetest german shepherd I ever had the pleasure of knowing. I love you, Duncan. 3/12/02 - 12/19/11