Remember that a lot of the threats that get picked up these days are nothing more than tracking cookies. They have a very small impact on your privacy, in that advertising companies can track some of the web sites that you visit, but are otherwise entirely innocuous. Most AV firms are guilty of classing tracking cookies as malware these days, and it can lead to situations like this, where you have an apparently high number of "infections" when in reality you have nothing of the sort.