What's the Difference Between a Bug and a Virus?

They are both code, but that is where their similarities end.

A virus is a successfully written chunk of code with malicious intent. It can wipe out data or send it to another person. It can rob memory resources and affect the performance of your computer. A virus needs to be removed with an antivirus program or cleaned by a technician or skilled user.

A bug is unsuccessfully written, benevolant code. Its intent is to enhance program content or functionality, but the code did not blend with your operating system, browser, or add-ons. There is nothing you can do about this type of error. Restarting your computer might help you to regain functionality of the program, but your computer isn't in danger of being wiped out.

I've been experiencing a bug in Facebook error and restarting resolves my browsing ability, but the error hasn't been corrected so it will continue until the code is rewritten.