Ok, I'm sure you a few of you know the effect of vacuum polarization. No, I read a book about quantum electrodynamics. In there this professor derives the effective charge of a positive nucleus we observe under the effect of vacuum polarization. This results in the following weirde fact: "The distribution of the virtual electrons and positrons is as this: The closer we come to the POSITIVE charged nucleus the more POSITRONS there are, meaning that there is more virtual positive charge". He say's than that this is absurd, because normally positive charge should attract negative charge. He then writes that this absurdity is explained in chapter 7 and so on... And than I looked in the internet. And everywhere, every pdf document says something different as this book. They say the positive nucleus attracts the negative vacuum charge. SO WHAT IS ACTUALLY RIGHT??