Swine flu and me: My own private quarantine

I'm not often faced with ethical dilemmas when picking up the kids, but yesterday I walked into the middle of the swine flu epidemic. When I went to get my older daughter, her teacher met me at the door with a grim look on her face and told me that one of the children had come down with "a flu." No word yet on what kind of flu, but the symptoms are consistent with, of course, the swine flu, and the timing corresponds with the international break-out and with the confirmation of cases in Brooklyn, where we live.

So what to do?