Phishing Emails

Hi…new to the forum

I seem to have a phishing “virus” that has gotten into my AT&T email [hosted on Yahoo]. It got into my contacts & sent out an email request for them to buy gift cards. I’ve run a full scan with Comodo but nothing shows up. Just wondering if all is clear? Did the phishing virus leave after accessing my contacts? I should mention that I’m using a MacBook Pro with High Sierra