Ds has been off colour for a few days and woke up this morning covered in lots of little pink spots that looked very much like the picture of measles in my book. (Felt very worried as MMR booked for Monday and I couldn't bear the thought that he'd caught the wild virus without any protection!). My GP said she didn't think it was measles, but a post viral rash (he's had a cold for about 10 days). Why would he get a rash from having a cold, when he never has done before? Is this what Drs say when they're not sure? Any explanation would be great