Oh no, I hope you don't get it too! But you did all you could do in the situation yesterday. However, when the family returns to daycare, hopefully Monday, if I were you I would take the time to tell them that you are still learning, but you really have to insist that they consider next time their child is feeling that ill whether they should bring him to daycare. Remind them that they would not like somebody else coming to daycare with such a bad virus and infecting their child and that's exactly what they did! You are there to protect ALL the children. That's exactly what I tell my daycare parents, but thankfully I have great ones at the present time and they keep their children home for serious colds.