My almost 4 year old ds had his needles yesterday and my 1 year old dd at the same time. He unlike her has never had a problem after his needles. Yesterday he complained of his arm being sore and didn't want to use it, it was slightly red at the injection site. He woke up this morning complaining of being hot and had a slight temp which I gave him Panadol for. He has been miserable all day and has now been asleep since 4.00 I woke him for dinner at 6 but he went back to sleep. He doesn't have a temp anymore. I know these are all common side effects but I am wondering if anyone's child has had similar and how long did it last?