I have been in a committed and loving relationship for 13 years now but was recently diagnosed with genital warts

My question is as follows 

How is this possible if both partners have been faithful 

What medical danger have I put my wife in and shud wd cease all sexual contact now, we have a full sex life including oral sex and im worried sick about this whole issue

Hoping you can give me some advice on how to cope with what is happening as im going out of my mind with worry

Yours respectively 

Mike