HELP PLEASE!?

What kind of rash does this look like!? We went to a restaurant on Saturday and this little girl came up and started touching my daughter on her back and neck after I had told her MULTIPLE times to not touch my daughter. She had some kind of skin infection all over her arms, face, and legs! I continually told her to stop and she wouldn’t. Her parents were no where in sight. I picked my daughter up and told the girl to please leave us alone, but she stayed and tried playing peekaboo with my daughter. Her very elderly grandmother (I think it was her grandmother) finally came over and said “Okay Sam, let’s get out of here.” I tried to tell the woman that the girl was touching my daughter repeatedly after I told her to stop, but the woman just kept on walking. I tried asking what kind of condition the girl had, but she did not answer me( trying to find out because she just spent 10 minuets touching my child and I want to know if what she has is contagious) By Sunday morning she had had a fever of 103 and would not eat or drink anything. She’s been sleeping constantly and doesn’t want to play at all. Her fever went down and she started eating a bit and I thought she was getting better. But now I see a small rash forming on her neck and i’m FREAKING OUT! I’m so afraid she’s going to develop whatever that girl had. I’m taking her to see her dr tomorrow, but I was just wondering if anyone on here can tell me what this might be to hopefully ease my mind.