Dyre

My PC was recently infected with the Dyre virus at work. The virus came by way of our email system which is outlook. An email came with an attachment. If u clicked the attachment, you were infected. At some point, I thought my work PC was clean and logged into my Yahoo web email. My first question is, if I sent any email through Yahoo was that email infected?? My second question is do the current Norton Internet Security detection files scan for the Dyre virus?? I have updated my detection files and run a full system scan. No threats were found. Is there something else I need to do to ensure I do not have this virus? Thank you!!!