So sorry about your dad, BirdDancer. Shingles is contagious until all blisters burst--and are scabbed over. Add 1 or 2 days to that for safety. Usually, 10 to 14 days or so.

You and your sis should just verify that they are in fact treating him with acyclovir or Famvir or whatever. You don't want him to get post-herpetic neuralgia, which can be painful for months and months and require narcotic pain medication. Hope that all goes smoothly.

As you know, it is one of the most contagious infectious illnesses on the planet, and you can get it twice, contrary to popular belief. So, be cautious around him.

Sending support and hugs!!