Clamxav scan summary??

It means all the virus definitions which ClamXAV scans for. This gets updated every time you open ClamXAV.

The key thing is Infected files: 0 and No infected files were found.

So you're okay.

 

ClamXav scans for both OS X and Windows malware. While there has never been any OS X virus in the wild, there are plenty for Windows.

Macs are not immune to malware, but no true viruses exist in the wild that can run on Mac OS X, and there never have been any since it was released over 12 years ago. The only malware in the wild that can affect Mac OS X is a handful of trojans, which can be easily avoided by practicing safe computing (see below). 3rd party antivirus apps are not necessary to keep a Mac malware-free, as long as a user practices safe computing, as described in the following link.

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Read the What security steps should I take? section of the Mac Virus/Malware FAQ for tips on practicing safe computing.