Having people wash hands before holding baby??

Since we are all having our babies for the holidays I'm curious on how to handle everyone wanting to hold/touch my baby! I'm a first time mom and I come from a hugggge Italian family with lots of little kids.  I'm worried with Thanksgiving, Christmas, Christmas eve, New Years.. etc. do you just tell everyone wash your hands before holding the baby? Or have hand sanitizer ready for them? And do they have to use hand sanitizer every time they want to hold the baby? do I tell them not to touch her face? I'm a first time mom so I'm clueless !!