Re: Virus on my yahoo account 
Their is no virus here.
- Change your password
- Change your DOB, Secret Question/Word
- Do you use your Yahoo ID to access other websites. For example like “Facebook Connect” - It seems like you do and when you access that particular website with your Yahoo ID/Pass it also gave access to your contacts.
- Try disabling access to your Yahoo Account from outside apps.
ps. you never know TLK manipulated your email id 